The drama always begins because the casino suspends the player's account just because he used the VPN and that is something that should not be, a casino that does not want to pay for that, because it simply looks bad to me, and it is something that is not it makes sense to lose a client because of that, and not only lose that client, but lose many more because that client tells his friends and they will have a bad idea about the casino, and then basically things will not look good.
Casino does not just lock or nail a client because they use VPN, but only if the client account exhibit some form of behaviour that raises the casino security team awareness to such account and oppond checking discover that the customer is using a VPN and if that be, the casino will consider such customer as a bad actor and will lick him out or demand for KYC to verify his identity, and also we have to know that, not all casino prohibits the use of VPN just like not all casino make kyc demands at point of account opening.
On the issue of multiple accounts, and VPN usage it may be so because some customers may be seeking to abuse the casino bonus and other system through the use of VPN to hide their identity.