[1] https://github.com/urbit/urbit/blob/develop/LICENSE.txt [2] https://urbit.org/overview/people-history
Where on the website do you see this?
This is very outdated and Tlon no longer operates/runs urbit.org but, in any case, the ToS says this: "The Site is owned and operated by Tlon", so the reference was to the website "urbit.org", not the Urbit project.
I don't think urbit is all that great, either, but this is coming from someone who decided to increase their investment in face to face conversations following social media starting to crumble.
Ethereum operates perfectly smoothly, with zero downtime since launching 8 years ago. In any case, besides peripheral features like NFT-gated forums and Ethereum Name Service created proxy names, this doesn't use Ethereum's distributed network. Just the public key wallet software built for using Ethereum.