Actually, those who have lost money should create a group so they can coordinate the pressing of charges against the staff of Betnomi.
Unless there is a large group of people and large amount of money being scammed then I guess this is never going to happen as it is a waste of time for some people. The fact is Betnomi is not one of the top casino that most people will go to and wager there so I assume only small amount of people probably wager there regularly and are left with couple hundreds in their balances or even less
Even if there was not in the top of the biggest casinos by volume of number of users, there must be thousands or even hundred of thousands of dollars in damages caused by this exit scam. Individually it may not the worth it to pursue them, but the solution is not to let scammers to away with this kind of disgusting behavior so easily, specially when they are not anonymous.
Are victims actually going to let them get away with a small fortune so easily without trying to get some justice out of it? It would be a pity, it would only encourage more theft in the future.