basically if you send 100$ you get 150$ in your account.
You can play as much as you want, but when you go to withdraw, they will take out the 50$ bonus they had given you....
Its kind of like a Bonus Play you can use over again, or kind of like more 'betting power'.....
Best way to use it is to use it all in one play, perhaps scalp it against another book where you have real cash and hope the Carib side loses.....