Perhaps we need a thread to discuss whether a casino should allow VPNs or not since the thread rarely touches the title or OP's intention of sharing VPN-friendly casinos or good VPNs for online casinos recently. Or OP can change the title to expand the discussion?
Good VPNs for access to casino sites and any other sites are primarily private VPNs on rented VPS. Meanwhile, using popular VPN services that provide users with free VPN can sometimes be quite risky, as you can get your account blocked. I mean, any casino wouldn't like the fact that some of its users would log in under the same IP address.