I am experiencing such banning of providers right now. It is a whack-a-mole, seems futile. Not to mention that most people use sketchy free noname VPNs that are just too numerous. Or apparently some people set up basic XRay/VLESS/whatever and sell it via a Telegram bot…
Not mentionning that anyone can set up their own VPN server… Good fucking luck with that 💀
You can ban big hosting providers, but even here they’re cautious with measures like that because it would break WAY too much. Not to mention that you could just use a lesser-known one, even if it doesn’t operate in the country legally.
I bet there comes the day that I need to share access to my server to allow people from other countries accessing the real free web through me…