No wonder, every government wants its share of the pie, and accordingly they do not allow the operation of unregistered online casinos in their countries. I don't know if it has anything to do with it, but a few days ago my finance minister also announced that he will block all those online casino/betting companies that operate illegally in my country, which is also part of the EU.
In a way, I don't see a problem with that, if you avoid paying taxes then it's logical that they block you - although we all know how to visit a website even if it's blocked - that's why VPN and Tor exist.