I think one of the big advantages for crypto casinos are that they offer games with a much lower minimum bet, betting with one satoshi or the smallest micro unit of a cheaper crypto currency, makes betting on online casinos affordable for everyone.
I don't see that as an advantage since casinos are anyway affordable for pretty much anyone these days. Also the winnings are a lot smaller if your bet is only 1 satoshi and that's why almost no one plays on that small amount. Good thing about this is that you could win a jackpot with only 1 satoshi bets so for those who are lucky this is an advantage