Yes but sometimes, some of them are not even aware of that the country is being restricted or maybe the casino may update their list and they were not aware.
I don’t see how that is possible as, once a country is restricted, any IP address trying to access a casino or sportsbook from a restricted zone is usually not given access. At the very least, you would get a denial notification to alert you that you are logging in from a restricted zone. At this point, they switch to VPN rather than abandon ship. Eventually, they always get caught up in the web they weaved.