No deposit bonus casinos use these bonuses to incentivize users to become members and take advantage of any additional promotions they are offering. There are three types of no deposit bonuses available on the market : Free Cash, Free Spins and Free Spins & Free Play. Even more simply put, this is about as close to 'free money' as things can get with online casinos. In simple terms, a no deposit bonus is where a user does not have to make a signup deposit when registering for an online casino for the first time.