120k is really a big amount of money, but I've played before in the FortuneJack without any problem but that time I don't have around 120k and it's just around 100-300USD I think it is really different when it comes to bigger money. I was curious about the ongoing lawsuit how was it? Does the FortuneJack know about it and what is their response to this kind of allegation.
I have read the link in the opening post and the amount it seems that out of 200k in winnings FortuneJack only paid 95k. As ufaiz50 said, this is a really high sum and not the one the average Joe can bet, so although I have zero experience with this casino, it is a possibility that they are selectively scamming this kind of gambling whales. Little krills shouldn't worry about it, but if PaperWallet is right, then it is a shame, and speaks very badly of this casino. But I agree with Hispo also that OP should provide more proof to determine who is right.