X trying to block transfer of platform's InfoWars accounts to The Onion

Does anyone know of a precedent for this? I've never heard of a social (or other) network claiming to own account identifiers, then again I don't read their ToS with a magnifying glass either.

If X owns the accounts then it shouldn't get Section 230 protection for them.

Couldn't Musk just suspend the account for some (fake) TOS violation so no one gets a useable account?