You should seriously just pull out of the U.S. market. It is wildly obnoxious to tease all the Microgaming and NetEnt games which will never actually be playable by Americans. All we get are the awful selection of junky slots that a dozen other "Bitcoin slot" sites offer to IP addresses in the USA.
The inference that NetEnt and Quickfire games now being Bitcoin enabled is really mostly meaningless if it's still geographically restricted to all the same people who could always play these games on a zillion other sites with lots of wallet options on par with Bitcoin.