Many people know of the no deposit casino bonuses offered by many Online Casinos but did you know about the Free Spin casino bonuses?  Free Spin casino bonuses are just what it sounds like.  You get a number of Free Spins on a selected Slot Machine to try and win as much as you can at no risk to your deposited bankroll.  You are actually spinning the reels for free, but all your winnings go into a casino bonus account.  Some casinos will limit the amount of winnings that are put into this account but some allow you to keep whatever you are able to win with your free spins.  The second part of the type of Casino Bonus is to then gamble with the free spin winnings at they regular casino games with an attached play through amount.  So you see at this point the free spin promo simply turns into a no deposit bonus but you had the ability to win the amount of the no deposit casino bonus.