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.
There is no KYC for smaller awards but if you hit Match 5 or Jackpot, there would be some KYC process to ensure we are compliant with the law. As you can understand that current jackpot of 448 million MBL is worth more than 1000 BTC (based on the purchase price of 0.001 BTC = 420 MBL) and no jurisdiction will allow this level of funds transfer without any KYC. If this is of concern and you have won the jackpot, you may want to get legal advice from your local lawyer who may be of help in creating trusts to shield your names and identity.