Or the casino business owners can run their casino in a secret place, and only trusted people who can join with them, and they only invite people who they known before. Usually, this type of casino has wealthy members who don't want to get caught by the police, and they pay for some money to corrupt police to protect their business. I think that it has run in many countries in which gambling is prohibited, but they are free to operate the casino.
The casinos that are running here are mostly run from a country that has at least not made crypto or games of chance illegal. They do follow the local rules and in case they face problems they would shift their business to another private place.
The OP posted an article that refers to gambling in places where it is prohibited by laws. This is not related to the "faith" casino business owners. They have not done anything wrong here. They provided a service and if your country does not allow you to avail the service then its your problem. Circumvention of blocks is nothing new in the internet where cyber crime control is negligent, so no problem for those who want to gamble from prohibited locations.