[$500 Bounty] Looking for potential & previous crypto casino exploits

[RobloxGambler]

Currently in the process of making a casino similar to csgoroll, where there will be 2 games - one player vs player [coinflip for a tax] & one multiplayer vs house [roulette]. We are looking to have the games provably fair probably done on the EOS blockchain.

We are hoping to get a list of potential exploits (potential current problems and also exploits that have happened in the past to crypto based casinos). Once we have a list of of these exploits in we will pick a winner at random to win $500 in btc or eth based on this thread and provide proof.

Good luck everyone.