The free spin bonus that people get would have cost money if they had to buy them on their own. Because of this, these people can start playing without any risk on their part. The player will find that they can win money with these free spins, and they do not have to spend their own money to gamble on the slot machines. The second part of the free spin bonus is that people will get that money converted into a no deposit bonus that they can use at any time. There are some people who will find that they can have free spin money turned into a no deposit bonus that is used elsewhere, and they can follow the same rules that they were following when they got their regular bonus. The casino could put a time limit on this, but it is like the player has infinite opportunity to turn that money into something that they can withdraw. In certain cases they can withdraw that money as soon as it was won.