I'm not allowed in, but good luck with your business. Not going to risk it with a VPN.

Out of curiosity, if you allow VPN use, how are you going to know if the account got stolen or not? Casinos usually don't allow people to use these services because it allows them to monitor the IPs and lock withdrawals if they're made from a different location than the one a player registered from. This may become an issue for you later on.