It's understandable to ban the site given it does break Vercel's terms, but the allegation that Vercel hasn't let the owner transfer the domain away is a serious concern. Removing a customer is always hard but you have to do it in a way that ends in a clean break between your business and the customer. Keeping a domain fails to achieve that in a big way.
I absolute believe that Vercel does not like to host it and they have the freedom to restrict the service. But I _am_ curious which term of the TOS it violated.
- The Services may only be used for lawful purposes.
- You shall not attempt to undermine the security or integrity of computing systems or networks of Vercel, its partners, or any other person, and must not attempt to gain unauthorized access.
- You may not use the services or Vercel's infrastructure for proxying, scraping, to create virtual private networks, or to create virtual private servers.
Reasonable people might disagree whether 12ft.io is being unlawful, undermining the integrity of a computing system, gaining unauthorized access, or proxying/scraping. So the TOS also says:
- The final decision of whether an account is in violation of any of these acceptable use terms is at the sole discretion of Vercel.