Discover the latest no deposit bonuses for May, all available at top casinos and tested by our experts for fairness and real value. Claim offers with standout features such as unlimited free spins, 25x wagering, or playable on hits like Big Bass Bonanza. Also, what needs to be mentioned is that even though no deposit is required to activate a NDB itself, one may be required to cash out the winnings. While it may not sound the fairest, it’s more or less a standard term not only in US-friendly online casinos, but casinos worldwide. Casinos use no deposit bonuses as a marketing tool to attract new players. It’s a low-risk way for players to try the casino, and casinos hope that after experiencing their games and service, players will make a real deposit. Think of it as a free trial – the casino invests a small bonus in exchange for potential long-term customers.