I don't remember exactly, and I don't think I'm making this up. I'll try to find it.. .
This is what I remember...there was a site/app? that was "legal" because there was no actual money being kept by the company, and that people got paid by making a withdrawal request, and the next time someone deposited, they just directly sent them money. But there was an issue with several players who had large sums, and when they tried to withdraw like 40K, they could only get paid what people were depositing, so it was really sporadic and incomplete.