Bonus Buy Casino UK: How Feature Buys Work

Updated September 2026

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Explore feature-buy mechanics, pricing, game variants and UK access restrictions before entering a paid bonus round.

What Bonus Buy Slots Are and How the Feature Works

Bonus buy slots are games that allow the player to enter a designated bonus round by paying a separate fee, rather than waiting for the required symbols to appear during ordinary reel spins. The purchase does not replace the slot itself. It changes the route into a feature that could otherwise be triggered through the base game.

In standard play, the reels are spun at the selected stake. A bonus round may become available when the game’s triggering conditions are met naturally. Where a feature-buy option exists, the game presents an alternative entry point: the player selects the purchase function, confirms the displayed price, and receives direct access to the relevant feature round. The exact interface depends on the game, but the underlying principle is the same—paid access instead of additional waiting.

How the price is calculated

The cost is linked to the base stake used for a spin. It is expressed as a fixed multiple of that stake, and the multiple is set by the game studio. Consequently, the purchase price changes when the underlying stake changes.

For example, a 100-times multiplier applied to a £0.10 stake produces a £10 feature purchase. Applied to a £1 stake, the same multiplier produces a £100 purchase. The arithmetic is straightforward, but the financial significance depends on the stake selected before the feature is bought.

This distinction matters because the displayed fee is not a separate form of credit or a conventional promotional bonus. It is a transaction for entry to a game feature. The resulting round remains subject to the slot’s programmed rules and random outcome generation; paying for access does not determine what the feature will award.

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The term “bonus buy” is widely used in discussions of these games, although market terminology can also include “Feature Buy” or “Buy Pass”. In each case, the relevant question is whether the option permits immediate entry to a feature for a stated multiple of the base stake. That definition separates a paid feature entry from ordinary free spins earned through the game’s normal sequence.

Bonus Buy Mechanics: Costs, Stakes and Feature Variants

A bonus buy changes the normal sequence of a slot round. Instead of making base-game spins until scatter symbols trigger a feature, the player pays a separate fee for immediate entry to that feature. The fee is not a universal charge: it is defined by the game studio and expressed as a multiple of the stake used for the relevant spin.

Stake multipliers and total cost

The financial calculation is straightforward. If a game sets the purchase at a particular multiplier, that multiplier is applied to the current stake. A 100x purchase at a £0.10 stake therefore costs £10. The same multiplier at a £1 stake costs £100. The price changes with the stake, even though the feature itself may be the same.

Published descriptions of bonus-buy mechanics give different ranges. Some account for fees of 50x to 100x the stake, while broader descriptions place purchases between 50x and 500x. These figures should not be treated as a fixed market tariff. They indicate that the cost can be substantial in relation to one ordinary spin, and that the purchase price must be checked inside the individual game rather than inferred from another title.

This structure also explains why a purchase described as a “cheap bonus buy” is not meaningful without a stated base stake. A low multiplier applied to a high stake may cost more than a high multiplier applied to a low stake. The relevant comparison is the total price of the feature and the stake on which it is calculated, not the multiplier in isolation.

Fixed-stake feature spins

Some bonus-buy systems separate the stake used to buy the feature from the stake used during the resulting bonus spins. Where the spins are bought at a fixed stake, the feature is played at the lower stake used for the purchase. This distinction matters when the base game allows several stake levels.

The purchase can therefore involve two related but different values:

• the stake selected when the feature is bought;
• the fixed stake applied to the bonus spins that follow.

The second value determines the monetary scale of wins during those spins. A feature purchased after selecting a lower stake does not become a higher-stake round merely because the account balance or the game’s maximum stake allows larger base-game bets. The terms displayed by the slot determine how the bonus round is valued.

A comparison of online bonus-buy slots should consequently record the purchase price and the stake attached to the feature. Looking only at the name of the bonus round leaves out the central financial condition. The same broad type of feature can operate under different purchase prices and stake rules in different games.

How volatility changes the alternative route

Volatility concerns the distribution and frequency of outcomes in the base game. It affects how often ordinary wins occur and how frequently a feature is triggered naturally through scatter symbols. Highly volatile slots generally pay out less frequently, so the intervals between meaningful base-game outcomes can be longer and less predictable.

The bonus buy changes access to the feature, but it does not remove the game’s underlying uncertainty. Paying the fee avoids waiting for scatters to land; it does not convert the feature into a known return. The outcome of the purchased round remains determined by chance, and the volatility profile remains relevant when the game is played normally.

This creates two distinct routes to the same type of feature:

1. Natural triggering: base-game spins continue until the required symbols appear.
2. Paid entry: the player pays the stated multiple of the stake and moves directly to the feature.

The first route spends money through repeated spins and leaves the timing of the feature uncertain. The second concentrates the expenditure in a single transaction but exposes the full purchase price immediately. Neither route changes chance into certainty. A more volatile slot may make natural access feel less frequent, while a purchase makes access immediate; that difference concerns timing and expenditure, not a guaranteed improvement in the result.

Comparing purchase variants

The practical differences between slots with bonus-buy features are therefore found in their pricing rules, stake treatment and relationship with the base game. A useful comparison should establish:

• whether the fee is calculated from the selected stake;
• which multiplier the game applies;
• whether the resulting bonus spins use a fixed, lower stake;
• whether the feature can also be reached through scatter symbols;
• how the game’s volatility affects naturally triggered access.

Terms such as “latest” or “popular” do not answer these questions. Nor does the presence of a buy button establish that the purchase is inexpensive. A demo version may display the mechanic without creating the same financial decision as real-money play, so a slots demo with a bonus-buy option is useful for observing the interface and feature sequence, but not for judging the cost of an actual purchase.

The central distinction is between paying for immediate access and waiting through base-game play. The fee is a stake multiplier, the resulting spins may be locked to the lower purchase stake, and volatility affects the frequency of natural access. Those conditions should be read together before the feature is assessed financially.

Bonus Buy Casino Games and Slot Examples

Bonus-buy games are not a single design category. The feature can be attached to different base-game systems, and the purchased round may involve free spins, a second screen, expanding symbols, or a separate collection mechanic. Consequently, comparing titles requires more than noting that a buy option exists. The relevant distinctions are the structure of the bonus, the game’s volatility, and the RTP disclosed for the selected mode.

Named slot examples

The following titles are associated with feature-buy discussions and illustrate different approaches to bonus rounds:

1. Big Bass Splash — a fishing-themed bonus structure involving fish symbols with cash prizes, collected wild symbols, additional free spins and reel multipliers. A profile review attributes multipliers of up to 10x to this feature. That description should be treated as a title-specific account, not as a general property of bonus-buy slots.
2. Money Train — a buy option described in a profile review as costing 80 times the stake. The feature moves the player to a second screen and awards free spins; the same source reports a buy-mode RTP of 98%. These details belong to the cited version and mode of the game rather than establishing a market-wide standard.
3. Fruit Party 2 — uses cluster pays instead of traditional paylines. A profile review describes its purchased feature as providing immediate access to at least 10 free spins, with the result depending on the scatters on the triggering spin.
4. Sweet Bonanza — a cluster-pay slot commonly discussed in connection with feature-buy play. Its example is useful because the distinction between the base game and the bonus round is central to how the title is evaluated.
5. Gates of Olympus — presents a multiplier-focused bonus structure rather than a conventional fixed-payline format. Its inclusion in bonus-buy catalogues reflects the way feature access can be attached to a distinct free-spin system.
6. Buffalo King Megaways — combines a Megaways-style reel arrangement with a bonus structure that is separate from ordinary base-game spins. The title demonstrates that a feature-buy label does not identify one uniform type of round.
7. Dead or Alive — associated with a free-spin feature and high-volatility play. The title is therefore relevant when comparing bonus-buy games whose base rounds may produce wins less frequently.
8. Dork Unit — another named example found in catalogues of slots with feature-buy functionality. Its significance for comparison lies in the separate treatment of the bonus round rather than in a shared mechanic across all titles.
9. Extra Chilli’s Feature Drop — uses a title-specific feature structure and is listed among games associated with bonus-buy options. The name itself signals that the purchased round is part of the game’s broader feature design, not a generic casino function.
10. Fire in the Hole xBomb — a named example of a slot linked with feature-buy play. Its presence in such lists does not establish identical pricing, RTP or bonus content across versions.
11. Immortal Romance — associated with a narrative free-spin system. It illustrates how a slot can have several character-linked bonus outcomes while still being discussed within the wider feature-buy category.
12. Jokerizer — another title used in catalogues of games with bonus access. The available feature, price and mode-specific RTP must be read from the individual game information rather than inferred from the title alone.
13. Madame Destiny Megaways — combines a Megaways format with a bonus structure that can be assessed separately from the base game. It belongs in comparisons of feature-buy titles because the bonus round is not simply an extra base-game spin.
14. The Hand of Midas — a named slot example associated with bonus-buy discussions. Its inclusion indicates availability of a feature-based format in the relevant game environment, not availability on every casino platform.
15. Wanted Dead or a Wild — another high-volatility title associated with bonus-feature access. It is a useful example of why the underlying game profile matters when considering a purchased round.

How the examples differ

The most visible difference is the type of bonus that follows activation. In Big Bass Splash, the described round centres on fish symbols, cash prizes, collected wilds, additional free spins and reel multipliers. Money Train, by contrast, is described as transferring play to a second screen before awarding its free spins. Fruit Party 2 demonstrates a different model again: its cluster-pay base game is linked to a free-spin feature whose outcome depends on the scatters on the triggering spin.

These distinctions affect what the feature-buy label communicates. It does not specify whether the round will use traditional paylines, clusters, a second-screen layout, cash symbols or multipliers. Nor does it identify the number of free spins, the way symbols are collected, or the conditions for extending a round. Those properties belong to the individual title.

RTP also requires title-level checking. Advertised RTP can differ between standard play and the purchased mode, and providers certify a separate buy-mode RTP in the game’s information panel. Some slots report a higher figure for the purchased mode, while others report a lower one. Therefore, a figure attached to one game cannot be transferred to another, and a buy-mode RTP should not be presented as evidence that purchasing the feature improves value. Every outcome remains determined by the game’s random process.

For a casino buy bonus catalogue, the most meaningful comparison is consequently structural: what bonus is entered, how the game displays it, which symbols or screens determine its result, and which RTP applies to that mode. The named examples above show why “slots with bonus buy” describes a family of related mechanisms rather than a standardised game type. Availability, pricing and the legality of the feature are separate questions and cannot be inferred from a title’s inclusion in a list.

Best Online Bonus Buy Slots for Real-Money and Free Play

Online slot reviews need to distinguish between real-money play and free or demo access. The same title may be available in both modes, but the comparison is not identical. Real-money play exposes the actual financial cost of each spin or feature purchase, while a demo version allows the game’s rules, volatility and bonus-round structure to be examined without a financial transaction.

This distinction is particularly important for bonus-buy slots. A feature purchase does not create a favourable outcome: every purchased round remains entirely dependent on luck. The presence of a buy option therefore does not establish that a game is better value than ordinary play, and no title can be identified as the “best” solely because it offers immediate entry to a bonus round.

Comparing real-money play

For real-money bonus buy slots, the relevant comparison is between the game’s published information and the cost of the selected mode. Advertised RTP can differ between standard play and Bonus Buy mode, so the RTP shown for ordinary spins should not automatically be applied to a purchased feature. Providers certify a separate RTP for buy mode where that distinction applies, and the relevant figure should be checked in the game’s information panel.

Buy-mode RTP is never above 100%. A stated buy-mode RTP of 96.3% represents a 3.7% house edge over time; it does not describe the result of one purchase and cannot predict whether an individual bonus round will win or lose. A marginally higher RTP in buy mode, where one is advertised, also does not remove the house edge or make the feature a reliable way to improve returns.

The mathematical cost of a bonus purchase is broadly comparable with the house edge applied through ordinary spins, and may be marginally lower in some games. That comparison concerns long-term probabilities rather than affordability, variance or the result of a particular round. A high-volatility slot can still produce irregular outcomes even when its published RTP appears competitive.

What free play can establish

Free online bonus-buy slots are useful for inspecting the interface and identifying how a game presents its feature. Demo access can show whether the bonus round uses free spins, multipliers, cash symbols or another structure, and it can clarify how the game moves between its base and feature screens. It also permits the volatility and frequency of base-game wins to be observed without treating simulated results as evidence of future performance.

Free play cannot establish that a purchased feature offers value. It does not reproduce the financial effect of losing the purchase price, and a favourable demo sequence has no predictive significance. Equally, an unsuccessful simulated round does not demonstrate that the game is defective or that a later purchase would be more likely to win.

The term “best online bonus buy slots” is therefore meaningful only when the comparison criteria are stated. Those criteria may include the clarity of the RTP information, the difference between standard and buy-mode RTP, the bonus structure and the game’s volatility. They do not include an assumption that real-money bonus buys are permitted on UKGC-licensed platforms. Free access can be used to examine a game, but it does not change the legal status of the feature or turn a luck-based purchase into a strategy.

Where Bonus Buy Slot Games Are Found

Bonus-buy mechanics are associated primarily with online video slots rather than with casino games in general. They may appear in games built around free spins, expanding symbols, multipliers, or a separate bonus screen. The purchase option is part of the individual game configuration, not a universal property of the slot category or the casino interface.

Main game categories

The following categories may contain slot games with a feature-buy option:

• Free-spin slots — the purchase opens the game’s designated free-spin round instead of requiring the relevant symbols to land during ordinary play.
• Multiplier slots — the bonus round may use changing or cumulative multipliers, with the purchase menu presented as one of the game’s available modes where permitted.
• Cash-prize slots — some bonus rounds use symbols carrying cash values, while the base game remains available without the feature-buy menu.
• Cluster-pay slots — games using symbol groups rather than traditional paylines can also include a purchasable bonus round.
• Megaways-style slots — variable reel configurations may be combined with a bonus feature, although the presence of that feature depends on the particular title and jurisdiction.
• Second-screen slots — some games move play to a separate bonus environment after the feature is activated, while others retain the original reel layout.

These categories describe possible design patterns, not a list of features available at UK-licensed casinos. A slot can belong to one of them and still operate only with its ordinary base-game mode for British players.

Availability depends on the operator and jurisdiction

A game’s presence in a casino lobby does not establish that its buy menu is available there. Bonus Buy availability is not permitted in all UK games, and the same title can display a feature-buy option at an MGA-licensed casino while showing no such menu at a UKGC-licensed casino. The underlying game may therefore remain available in Great Britain, but only through its standard play mode.

This distinction is important when compiling a bonus-buy slot games list. The relevant question is not merely whether a title was designed with a purchasable feature, but whether that mode is enabled by the operator for the applicable market. An online casino may carry the same release in different configurations, with the feature menu controlled by regulatory and platform settings.

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What the information panel establishes

Where a buy mode exists, its conditions should be treated as a separate game configuration. Providers certify a separate RTP for buy mode, and that figure is listed in the game’s information panel. The panel can therefore distinguish the standard game information from the parameters attached to the purchased feature.

Free bonus-buy slot games in demo environments may reproduce the interface of a title without establishing that the same mode is available for real-money play in the United Kingdom. Conversely, a casino game may retain its ordinary reels while omitting the purchase control entirely. For that reason, claims about online casinos with bonus-buy access cannot be inferred from a game’s name alone, and “best” cannot be determined simply by placing titles into a universal ranking.

Casino Slots with Bonus Buy Features: How Their Rounds Differ

Casino slots with bonus-buy functionality do not share one standard bonus-round design. The purchase changes how the feature is entered, but the feature itself remains specific to the game. Some rounds focus on cash symbols, others on multipliers or free spins, while some move the player to a separate game screen. These structures affect what can happen during the round, not whether the result will be profitable: each outcome is determined entirely by luck.

Cash-symbol and collection rounds

A cash-symbol round places individual monetary values on selected symbols. In Big Bass Splash, the bonus includes fish symbols carrying cash prizes. The round also includes collected wild symbols, extra free spins and reel multipliers reaching 10x, according to a specialist review. These elements create a collection-based structure: the value shown on symbols and the applicable feature effects determine the result of the round.

The presence of several components does not make the result predictable. A purchased entry can lead to a round with few valuable symbols, while the same design can produce a different result on another play. The feature therefore supplies access to a defined set of mechanics rather than a fixed return.

Multiplier-based rounds

Multiplier features alter the value of winning combinations or collected symbols. In Big Bass Splash, reel multipliers form part of the bonus structure described above. Their function is different from a cash symbol: a cash symbol contributes a stated prize value, whereas a multiplier modifies the effect of a win within the round.

Multiplier mechanics can also be combined with free spins or other bonus elements. The existence of such combinations should not be treated as evidence that a feature-buy mode has a better expected outcome. The round still depends on the symbols and events generated after entry.

Free-spin rounds

Free spins remove the need for a separate stake on each spin within the feature, but they do not remove uncertainty from the result. Fruit Party 2 uses a cluster-pay system rather than traditional paylines. A specialist review states that its feature purchase gives immediate access to at least 10 free spins, with the number depending on the scatters on the triggering spin.

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This structure differs from a cash-collection round because the central unit is a sequence of spins. Cluster wins are evaluated during that sequence, and the relevant scatters determine the awarded entry described in the review. The free-spin count is therefore part of the feature design, not a guarantee of a particular payout.

Alternative-screen bonuses

Some casino games with bonus-buy functionality transfer play to a separate screen. A specialist review describes Money Train as moving the player to a second screen, awarding free spins and reporting a buy-mode RTP of 98%. That description concerns this particular game and should not be generalised to all slot machines with bonus buy.

A second screen can change the visual layout and the available actions without changing the basic uncertainty of the round. Its mechanics may differ substantially from a base game, so the game information panel remains relevant when comparing the stated RTP for the selected mode.

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These categories can overlap. A single bonus may combine free spins, cash symbols, wilds and multipliers, while another may rely mainly on a separate screen or cluster wins. For UK readers, such descriptions concern game mechanics only; they do not establish that the feature is available through a UKGC-licensed casino.

Bonus Buy Slot Machines and Casino Access in the UK

The phrase “bonus buy slot machines” describes a game feature, not a category of casino licence. A slot may contain a menu that allows direct entry to a bonus round, but the legal position depends on the operator offering the game and the jurisdiction in which the gambling service is provided. These are separate questions and should not be treated as interchangeable.

For British consumers, the relevant distinction is between a game’s technical design and the permissions attached to a UKGC-licensed casino. The UK Gambling Commission prohibited feature buys for British players in 2019 as part of its safer-gambling policy. Consequently, a casino licensed by the UKGC cannot offer a slot-machine bonus-buy function to consumers in Great Britain. The restriction applies to the feature, not necessarily to the underlying slot.

The same slot can appear in different forms

A game may remain available through a UKGC-licensed operator after its buy menu has been removed or disabled. In that setting, the base game can still be played, while the option to purchase immediate access to a feature is absent. This explains why the same title may appear to have different functionality at different casinos.

The distinction is particularly important when a game is seen at an overseas or differently licensed venue. A foreign operator may display a feature-buy option where a UKGC-licensed casino cannot. That difference does not establish that the feature is permitted in the British market, nor does it make the foreign venue a UKGC-licensed casino.

Searches for bonus-buy casinos in the UK can therefore produce a misleading impression if they combine British-facing results with information about jurisdictions that apply different rules. The presence of a buy menu on a website is evidence only of what that website displays; it is not evidence of authorisation to provide the feature to consumers in Great Britain.

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The same principle applies to the question of how to buy a bonus on slot machines. Where the feature is permitted, the game interface may contain a purchase route. That procedure cannot be transferred to a UKGC-licensed operator, because the relevant menu is not available there. Any description of a slot-machine bonus buy must therefore identify the jurisdiction and licensing context rather than imply general UK availability.

How Online Casino Bonus Buys Are Activated

A feature-buy transaction follows a defined sequence when the game and jurisdiction permit this function. It is not a standard option at a UKGC-licensed casino: UKGC rules do not permit bonus-buy features, so the following procedure does not describe play through operators licensed by the UK Gambling Commission.

Activation sequence

1. Open a slot that includes the feature. The game must contain a bonus-buy function supplied by the game studio. A slot may offer a bonus round during ordinary play without providing a paid shortcut to it.

2. Check the game information. The relevant menu identifies whether a feature purchase exists and states the price. The price is expressed as a fixed multiple of the base stake, and that multiple is set by the studio rather than selected by the player.

3. Set the base stake. The stake shown for a regular spin determines the reference amount for the transaction. The displayed purchase price changes when the base stake changes because the fee is calculated from that stake.

4. Select the feature-buy option. Choosing the relevant button opens the purchase prompt. This is the point at which the game shows the amount required to enter the feature round rather than continue with ordinary reel spins.

5. Confirm the payment. The player authorises the stated fee from the available gambling balance. A confirmed purchase is a paid trigger for the slot feature; it is not a deposit bonus, a promotional credit, or a guarantee of any return.

6. Enter the bonus round. After confirmation, the game moves directly to the purchased feature instead of waiting for scatter symbols to land during the base game. The round then follows the rules assigned to that particular slot.

This process explains how to buy a bonus on an online slot in jurisdictions where the mechanism is lawful and the operator makes it available. It should not be interpreted as guidance for accessing an online casino bonus buy in Great Britain. A game can retain its ordinary spins and naturally triggered bonus round while the purchase menu is absent from a UKGC-licensed version.

The transaction also differs from an Ante Bet. An Ante Bet preserves an element of the base game, whereas a feature purchase pays for immediate entry to the bonus round. The distinction matters because the latter bypasses the normal trigger condition rather than changing the stake for standard play.

Why Bonus Buy Slots Are Not Permitted in the UK

Bonus Buy, also known in industry terminology as a Feature Buy, is not available on any UKGC-licensed casino. The restriction applies to operators serving British consumers under a licence from the UK Gambling Commission, rather than to the underlying slot software in every jurisdiction.

The UKGC prohibited feature buys for British players in 2019 as part of its safer-gambling measures. The policy was framed as a consumer-protection response to accelerated spending: a player can move directly to a high-cost feature instead of progressing through the base game. Removing that option prevents the immediate purchase of a bonus round on regulated British casino sites.

This means that a slot may still exist in the UK market while its buy menu is absent. The same title can display a Feature Buy option at an MGA-licensed casino and show no such option at a UKGC-licensed casino. The difference concerns the operator’s regulatory permissions and the version of the game made available in that jurisdiction, not necessarily the slot’s identity.

Can bonuses be bought on UK slots?

On a UKGC-licensed casino, bonus rounds cannot be bought through a Feature Buy menu. The slot may remain playable in its standard format, with the feature reached only through the game’s ordinary mechanics. A differently licensed venue may present the purchase option, but that does not make it permitted for a UKGC-licensed operator.

Accordingly, the answer to whether bonuses can be bought on slots in the UK depends on the regulatory context. They are unavailable through UKGC-licensed casinos, and the 2019 prohibition is specifically linked to reducing rapid, additional spending rather than to removing the games themselves. Feature-buy availability outside the UKGC framework should not be treated as evidence that the option is authorised for British players.

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How to Use a Bonus Buy Feature Without Misreading Its Cost

A feature purchase requires more than checking the displayed price. The first figure to identify is the stake multiple: the game expresses the cost in relation to the base stake, and the multiplier is set by the studio. A 100x purchase therefore costs £100 when the underlying stake is £1 per spin. The same calculation applies at lower stakes, but the resulting charge remains a separate transaction for the feature round.

The relevant RTP must also be identified. RTP for standard play does not necessarily describe the purchased mode. Providers certify a separate buy-mode RTP, which should appear in the game’s information panel where that mode exists. The UK Gambling Commission requires operators to give clear information about RTP and odds. A single slot can therefore display different figures for ordinary spins and a purchased feature. One specialist review, for example, reports a slot showing 96% RTP in standard play and approximately 94% when the feature is purchased; that is a game-specific reported comparison, not a general market rule.

A further check concerns promotional wagering. The purchase price can exceed the maximum stake permitted by a casino’s bonus terms. If a bonus is being used, paying for the feature may breach those terms and invalidate the offer, even when the underlying slot itself accepts the transaction.

These checks describe how to assess the cost where a feature-buy menu is legally available. They do not establish availability in Great Britain: feature buys are not permitted on UKGC-licensed casinos. The figures should therefore be treated as information about the mechanics of games offered in jurisdictions where the feature is allowed, not as an instruction to seek or use it through an unauthorised operator.

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Prepared by the Casinouk Bonuses Info editorial staff.