Online casino bonuses can be genuinely valuable — but only if you understand exactly how they work. This guide covers every major bonus type, explains wagering requirements in plain English, and highlights the best strategies for claiming Bonus Crab-specific promotions.
Written by Marcus Granlund (iGaming Analyst, 8+ years) and reviewed by David Chen (Bonus & Promotions Expert, 5+ years). Last reviewed: April 2026.
The most common bonus type, awarded on your first deposit. Usually a match bonus (e.g., 100% up to €500) sometimes combined with free spins.
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Free spins or bonus cash awarded simply for registering an account — no deposit required. Ideal for risk-free exploration.
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Match bonuses offered to existing players on subsequent deposits. Typically lower percentages than welcome bonuses (25%–75%).
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Credits to spin a specific slot game at no cost. Common as part of a welcome package or as standalone promotions.
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A percentage of your net losses returned, usually weekly. Provides a safety net and extends your playing time.
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Specific promotions tied to the Bonus Crab mechanic — extra spins on Bonus Crab games, multiplied bonus rounds, or cashback during Bonus Crab sessions.
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Wagering requirements (also called playthrough requirements) are the most misunderstood aspect of casino bonuses. They determine how many times you must bet a bonus before it becomes withdrawable cash.
Calculation Example
"A 35x wagering requirement on a €100 bonus is not the same as 35x the deposit+bonus combined (which would be €7,000). Always check whether the multiplier applies to the bonus only or the bonus plus deposit."
What does "35x wagering" mean?
It means you must bet 35 times the bonus amount before you can withdraw. Example: €100 bonus × 35 = €3,500 in total bets required.
Do all games contribute equally?
No. Slots typically contribute 100%, while table games may contribute 10%–20% or be excluded entirely. Always check game contribution tables.
What is a "Max Bet" restriction?
Most bonuses prohibit bets over €5–€10 per spin while wagering is active. Exceeding this can void your bonus and winnings.
What happens if I don't complete wagering?
Unused bonus funds are forfeited. Any winnings from the bonus may also be removed. Complete wagering before the bonus expires.
Specialist tips from our iGaming team
Verify game contribution
Confirm Bonus Crab games count 100% toward wagering before claiming. High-volatility games are sometimes restricted.
Use demo mode first
Understand the Bonus Crab selection screen before wagering bonus funds — optimal path choices vary by game.
Check max bet rules
Bonus Crab sessions can encourage large bets. Ensure you stay within the maximum bet allowed while a bonus is active.
Opt for low wagering casinos
Our toplist highlights casinos with under 30x wagering — these give you the best Bonus Crab session value.
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