Exchanges and casinos block ips from the United States but everyone just uses a VPN, why even block their ips in the first place when you know they are going to do it anyways. I'm guessing they do it so they have some type of deniability?
I will explain simply:
the government creates a law that forbids your citizens from using thing X if that thing X is not legalized or has no license issued in your country
thing X ban IP from the country that the government forbid their citizens to use thing X and do that to respect government
If citizens of the country where the government has forbid the use of thing X want to circumvent this ban and use thing X using VPN then they should not complain when they have their accounts blocked and even respond in court.