It's a global jackpot and people outside of USA can also play. You get free 20 MBL tokens to play with when you sign up. Instructions to buy more MBL using BTC or ETH are inside the app.
It is good to know that the Match Billion allow gamblers globally to play.
However, I have a question for you relates to KYC of gamblers on your site.
Do gamblers have to surpassed KYC requirements to play on Match Billion, and be able to withdraw their money out of Match Billion site?
Of course, I hope the site dont require KYC verification.