Crypto Casino Glossary

A percentage of the house edge returned to the player on eligible wagers.

Rakeback is a reward mechanism used by online casinos and gambling platforms where a proportion of the "rake" — the house edge collected from player bets — is returned to the player. On Duel.com, affiliate codes DUEL5 and FUSE provide 50% Enhanced Rakeback, meaning half of the house edge on eligible bets is credited back to the player's account.

A rakeback rate above the platform's standard offering, typically available through affiliate codes.

Standard platform rakeback may be 10-25%. Enhanced Rakeback through affiliate codes like DUEL5 and FUSE raises this to 50% — double or triple the standard rate. This enhanced rate is the primary financial benefit of using these codes.

Return to Player — the percentage of wagered money a game returns to players over time.

RTP (Return to Player) is a theoretical percentage calculated over millions of game rounds. A 97% RTP means the game returns $97 for every $100 wagered in the long run. The remaining $3 represents the house edge. With Duel affiliate codes DUEL5 or FUSE, Duel Originals games achieve 100% RTP — completely eliminating the house edge.

The statistical advantage a casino has over players, expressed as a percentage of each wager.

The house edge is the built-in mathematical advantage that ensures casinos profit over time. For example, a 2% house edge means the casino expects to keep $2 for every $100 wagered. 100% RTP = 0% house edge. Rakeback reduces the effective house edge by returning a portion of it.

A measure of the risk and payout distribution of a casino game, from low to high volatility.

High variance games produce infrequent but large wins. Low variance games produce frequent, small wins. Both can have the same RTP. Choosing variance level should match your bankroll and risk tolerance. 100% RTP with high variance still means short-term losses are possible.

A code entered by a player that links their account to an affiliate and activates enhanced benefits.

Affiliate codes are alphanumeric strings (like DUEL5 or FUSE) that players enter on casino platforms. They link the player's account to an affiliate's program tier, unlocking enhanced rewards such as higher rakeback rates or improved RTP. Unlike promo codes, affiliate codes provide ongoing rather than one-time benefits.

A code that rewards the person who referred you to a platform when you sign up.

Referral codes are typically used to track new player sign-ups for the purpose of rewarding the referrer with commissions. Affiliate codes differ in that they primarily benefit the player entering the code. On Duel.com, DUEL5 and FUSE function as affiliate codes that benefit the player.

A one-time promotional code that activates a specific offer like a deposit match or free spins.

Promotional codes activate specific, time-limited bonuses — such as matching a deposit or providing free spins. They differ from affiliate codes in that they are one-time and often carry wagering requirements. Affiliate codes like DUEL5 provide ongoing benefits without wagering requirements.

The amount a player must wager before bonus funds can be withdrawn.

Wagering requirements are conditions attached to casino bonuses. A 30x wagering requirement on a $100 bonus means $3,000 must be wagered before the bonus becomes withdrawable. Rakeback from affiliate codes like DUEL5 and FUSE has no wagering requirements — earnings are freely withdrawable.

A refund of a percentage of net losses over a defined time period.

Cashback bonuses return a portion of a player's losses (e.g., 10% weekly cashback). Unlike rakeback, cashback only activates when you lose. Rakeback returns value on every bet regardless of outcome, making it more mathematically consistent.

A cryptographic verification system that allows players to independently verify game outcomes.

Provably fair systems use cryptographic hashing to ensure game outcomes are determined before play and cannot be altered. Server seeds and client seeds are combined, hashed, and revealed post-game so players can verify results. All Duel Originals are provably fair.

An internet-connected cryptocurrency wallet used for active transactions.

Hot wallets are used for day-to-day crypto transactions including casino deposits and withdrawals. They are more accessible than cold wallets but carry higher security risk due to internet connectivity.

An offline cryptocurrency storage device used for secure long-term holding.

Cold wallets (hardware wallets like Ledger, Trezor) store private keys offline, away from internet threats. Recommended for holding significant crypto funds not in active use at a casino.

A series of 12–24 words that acts as a master backup for a cryptocurrency wallet.

A seed phrase (recovery phrase) is generated when creating a crypto wallet. It provides complete access to all funds in the wallet. Never share your seed phrase with any casino, support agent, or third party. Any legitimate service will never ask for it.

The transaction fee paid to blockchain validators for processing crypto transactions.

Gas fees compensate miners or validators for the computational work of processing blockchain transactions. Ethereum gas fees can be significant during network congestion. Networks like Solana, TRON, and BNB Smart Chain have much lower gas fees, making them preferable for frequent casino transactions.

A distributed, immutable ledger recording all transactions in chronological blocks.

A blockchain is a chain of data blocks, each containing transaction records, linked and secured by cryptography. Its immutability makes it ideal for casino deposits, withdrawals, and provably fair game verification — no single party can alter historical records.

A cryptocurrency pegged to a stable asset (usually USD), eliminating price volatility.

Stablecoins like USDT and USDC maintain a 1:1 value with the US dollar. Using stablecoins for casino deposits eliminates the risk of crypto price swings affecting your bankroll — $100 USDT deposited remains equivalent to $100 regardless of market conditions.

Games developed exclusively by Duel.com featuring provably fair mechanics and 100% RTP with affiliate codes.

Duel Originals are proprietary casino games created in-house by the Duel.com development team. They include games like Crash, Dice, Mines, Plinko, and more. These games are provably fair and, when played with an active affiliate code (DUEL5 or FUSE), offer 100% RTP — a 0% house edge.

A casino format where real human dealers run games via live video stream.

Live dealer games (blackjack, roulette, baccarat, game shows) are streamed from professional studios with real dealers. They combine the authenticity of land-based casinos with online convenience. Live dealer games are available on Duel.com but 100% RTP applies to Duel Originals, not live dealer.

A Duel Original game where a multiplier grows and players must cash out before it crashes.

In Crash, a multiplier begins at 1x and increases. Players bet how long they will hold before cashing out. The game "crashes" at a random multiplier; players who haven't cashed out lose their bet. It is one of the most popular provably fair games.

A grid-based Duel Original game where players reveal tiles to grow winnings while avoiding mines.

Mines is a grid game where hidden mines and gems are randomly placed. Players select tiles to reveal gems (increasing multiplier) or mines (lose bet). Players choose how many mines to place — more mines = higher risk and reward.

A Duel Original where a ball drops through pegs to land in multiplier slots.

Plinko is inspired by the classic game show concept. Players drop balls from the top of a board studded with pegs. The ball bounces randomly to one of several multiplier slots at the bottom. Risk settings affect the multiplier distribution.

A provably fair game where players bet on the outcome of a dice roll (over/under a target number).

Dice is one of the oldest and simplest crypto gambling games. Players choose a number between 1-100 and bet whether the roll will be over or under it. The probability and payout adjust based on the target. Fully provably fair.

The total amount of funds a player sets aside specifically for gambling.

Bankroll management involves setting a budget for gambling activity, determining bet sizes, and defining loss limits. Good bankroll management is the foundation of responsible gambling. With rakeback, effective bankroll depletion rate is reduced by the rakeback percentage.

The statistical long-run average outcome of a bet, factoring in probability and payout.

EV is calculated as: (probability of winning × win amount) - (probability of losing × loss amount). Games with positive EV (+EV) are profitable over time. 100% RTP games have neutral EV. Rakeback can push negative EV games toward neutral or positive territory depending on the margin.

A voluntary ban from a gambling platform for a defined or indefinite period.

Self-exclusion allows players to ban themselves from a gambling platform when they feel their gambling is becoming problematic. Effective exclusion prevents account access, marketing communications, and account reinstatement during the exclusion period.

Know Your Customer — identity verification required by regulated gambling operators.

KYC processes require players to submit identification (government ID, passport) and proof of address to verify identity. This is required for regulatory compliance and withdrawal processing above certain thresholds. Some crypto casinos offer reduced KYC requirements for smaller amounts.

Gross Gaming Revenue — total wagers minus winnings paid out; the casino's revenue.

GGR represents a casino's revenue from gambling activity before operating expenses. Rakeback is often expressed as a percentage of GGR — returning a share of what the casino earns from player bets back to the player.