Comment by jijijijij
Yes, and email is decentralized in theory...
If using a VPN for access is forbidden by the ToS, you only need to detect a VPN connection once to prove violation.
The IPv4 address space to consider is limited and it is technically absolutely feasible to exhaustively scrape and block the majority of VPN endpoints. Realistically any VPN provider will have some rather small IPv4 subnets make do, shit's expensive. More so, for the trivial case, VPN anonymization works best, when many people share one IP endpoint, naturally the spread is limited. There are VPN providers, some may even be trustworthy, which have the mission of "flying under the radar" with residential IPs and all, but they are way, waaaay more expensive. For most people that's no option.
IPv6 is a different matter, but with the very increase in tracking and access control discussed here, that may be even more of a reason, IPv6 is not going to be a thing any time soon....
Thinking about it, maybe this AI monetization FOMO and monopoly protectionism, will incidentally lead to a technological split of the web. IPv4 will become the "corpo net" and IPv6 will be the "alt net". I think there may be a chance to make IPv6 the cool internet of the people, right now!
> you only need to detect a VPN connection once to prove violation
But an IP address is not a person (legally in the US at least), and many IPv4 addresses get re-used fairly often. My home 5G internet changes IP every single day, and it's a constant struggle because other users often get my IP blocked for things I didn't do. I cannot even visit etsy.com for example. Just for fun I even checked 4chan and the IP was banned for CP, months before I ever had this particular IP (because I'm paranoid and track all that stuff).