Before looking at any code, it helps to know what kind of site you are signing up to. Rainbet is a crypto-first online casino with an attached sportsbook, founded in 2023 and operated by RBGAMING N.V. "Crypto-first" means deposits and withdrawals are built around cryptocurrency, with bank transfers and gift cards also listed. You fund an account by sending coins from your own wallet rather than typing card details.
The practical differences for a newcomer are speed and paperwork. Deposits credit after one blockchain confirmation, usually within minutes, and withdrawals are normally processed quickly under normal conditions. Sign-up is no-KYC, so you are not uploading documents on day one, though documents may be requested later, typically around larger withdrawals.
Rainbet splits into three broad areas that share one wallet and one rewards progression:
Slots and live tables: thousands of slot titles from dozens of studios, plus live-dealer tables and game shows.
In-house originals: about ten provably fair games, including Chicken Cross, Wheel, Plinko, Mines, Keno, Limbo, Rock Paper Scissors, Dice and Case Battles. These run on RNG software you can verify yourself via the outcome seed.
Sportsbook: 35-plus disciplines and hundreds of events daily, pre-match and live, including esports.
On top of the games sit ongoing rewards: rakeback, daily reloads, a daily bonus, weekly and monthly bonuses, rank-up rewards and RakeBoosts. Rakeback accrues on all wagers, is claimable at short intervals and is paid win or lose. Loyalty rewards including rakeback carry no wagering requirement and land as ordinary balance.
The code sits at one specific point: account creation. Entering RAKEBACK100 during registration attaches a welcome package worth a 250% deposit bonus up to $2,100, 60 free spins across your first three deposits, and a 20% rakeback boost for your first 72 hours of play.
That package is spread rather than paid at once: 100% on the first deposit, 50% on the second, 100% on the third, with 20 free spins at each stage. The free spins are on a Pragmatic Play slot, with spin value and the winnings cap shown when the spins credit. The rakeback boost lifts the standing rakeback percentage for 72 hours from the start of play; boosts do not stack or queue, so the highest active percentage applies.
The field itself is a single optional line on the registration panel, labelled promo, referral or affiliate code and often collapsed behind a "have a code?" toggle. It is not in the cashier.
Go to rainbet.com and click Register in the top right; a modal opens over the homepage.
Choose a signup method: email, Google, Steam or Web3 wallet. Email keeps all fields visible.
Fill in email, username and password.
Expand the promo/referral code line and enter RAKEBACK100 exactly, with no spaces.
Tick the box confirming you are at least 18 and accept the terms, then submit.
Open the promotions page and opt in to the chosen welcome bonus before depositing.
Make the first deposit through the crypto cashier: pick a coin, copy the address or QR, send from your wallet.
Once the deposit credits, check the bonus balance, the first tranche of free spins and your rakeback percentage.
The code must be entered at account creation. It cannot be attached afterwards and support cannot retro-fit it. The bonus is also opt-in on the promotions page before depositing; betting first can forfeit it.
Each of the first three deposits has its own qualifying minimum, maximum and cap, and the full $2,100 with all 60 free spins requires completing all three. A wagering requirement of 40x on bonus funds and free spin winnings is commonly quoted, although the exact multiplier and per-game weighting should be read on the promotions page at opt-in rather than taken from reviews. For scale, $2,100 at 40x equals $84,000 of turnover; at roughly a 2.6% edge, expected loss is around $2,100.
Other limits: eligible slots exclude titles above 97.4% RTP, with Hacksaw Gaming and Nolimit City named as ineligible; a maximum bet applies while a bonus is active, commonly cited as a small percentage of your deposit. Two welcome paths exist, one wager-locked and one dripping bonus into withdrawable balance as a percentage of wagers, with different cashout caps; the lower-wagering path covers only the first deposit, and the choice is effectively final once you deposit.
You must be 18+, or older where local law requires. Rainbet is not available in some countries, including the United States, and geographic restrictions apply to the bonus. There is no dedicated mobile app; the site runs in a mobile browser. Deposit-limit and self-exclusion tools are available.
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