This is what I was told by a person that plays there:
As best I can tell - a $50 deposit I made took $57.07. But like I said they'll rebate monthly. Maybe more often if you ask. They do not rebate the foreign fee or the signature ($1.00). My rebate on that $57.07 would be $5.11.
If you've never asked for a rebate - ask now and see how far back they will go. Good luck and let me know what you find out!