it may attract some players in the beginning, but i don't think, he can sustain the interest of those players. so high likely that such endeavour is only short-term.
well, he can try running this and see for himself how many people will try to join the game. but the longevity is usually the dilemma here.
OP should consider the cost and the profit he's going to make, he needs an auditor to audit the contract not just a small auditor he needs a reputable auditor he also needs a platform to embed the smart contract and the hardest part is promoting it, if he has the budget and he is ok with whatever result then he can proceed at least he created something unique in the casino ecosystem.
Promotion should not be on this forum only there are other communities, he can promote but having it here in Bitcointalk will give it a good takeoff, so the ball is in OP's hands now if he wants to proceed or not.