No deposit bonuses come in three main flavors: free spins, free credits or free cash. What are the main types of no deposit slot bonuses? That being said, redeeming a no deposit bonus doesn’t compel you to make a deposit once the promotion expires, although that is encouraged. No deposit slot bonuses create an opportunity to play online slots for free and keep what you win, which is why they are extremely popular. They can also be given to account holders under certain circumstances. They can be a part of the welcome package an online casino advertises to all its prospective users and it helps draw attention to the brand. No deposit bonuses are usually offered to new players as a way to incentivize them to sign up. As its name suggests, a no deposit slot bonus is a type of casino bonus that doesn't require players to make a deposit in order to receive some kind of reward, like slots free spins, free casino credits or even free cash.