if they knew that the game had an error and kept it open then its all their fault and they have to pay.
See, I would agree with this but how the hell do you prove that? It also wouldn't make sense unless FJ really thought OP was going to lose
everything. Otherwise it would make more sense for the casino to step in and put a stop to it before a problem like this arose. The only thing the casino would have to gain would be OP's original deposit, right? I mean in the case that FJ knew it would eventually deny his claim to his winnings and let him play anyway.
I don't know if FJ would do that; if it would be worth the hassle for them; and how anyone could show their intent to do that. Again, I'm not really taking FJ's side, but I'm looking at OP's assertion with a skeptical eye.
Edit:
there is to much money on the table to hope that everybody is honest...... maybe somebody can prove it.
You got that right. And what DarkStar_ said basically what I said, the whole thing rests on whether they knew about the bug and chose not to fix it and let OP continue to play in the hopes that he'd lose his original deposit. I'm not sure a reputational smear is worth that for a casino, but who knows.