No sportsbook or casino like usage of VPN. They are not stupid they know when someone uses VPN or proxy. They probably won't mind while you are losing but when you start winning then problems start. My advice is don't give them a reason to take you your hard earned money.
you are right to say that, in general this is the best advice, but this applies when we are talking in general, i.e. you can tell people to be careful with casinos, not to use VPN, but there are casinos with different rules where they allow the use of VPN, I don't understand how it is possible that the same casino that allows the use of VPN also asks customers to do KYC, but since I don't know how demanding the guys from curacao are when it comes to obtaining a license for casinos, so I'm not going to have no way of knowing if licensed casinos in Curacao are obliged not to accept vpn in their casinos
my recommendation is that before people create accounts at the casino they read the TOS and respect the TOS, of course they also need to look more carefully at the type of casino they are going to use, when a person sees that the casino in the past has already had a history of preventing that several customers withdraw money allegedly because they broke the tos, so this person needs to stay away from this casino even if the casino support keeps saying things like: they accept anonymity, no KYC, allow VPN, instant payments, high odds values... no no matter what the casino offers, these are traps, one has to stay away
duelbits fortunately is an excellent and reliable casino