Classic not a lawyer but the terms of service say,
We give you a personal, worldwide, royalty-free, non-assignable and non-exclusive license to use the software provided to you as part of the Services. This license cannot be assigned, gifted, sold, shared or transferred in any other manner to any other individual or entity without X’s express written consent.
(Emphasis mine)
Twitter accounts are commonly shared by many individuals and I guarantee they do so without written consent. Does that invalidate/bring into question the whole clause or just the sharing part?
My understanding is that it’s the transfer clause he is focusing on. It’s just not clear to me that violating one part of the clause doesn’t bring the rest into question.
In the cases of POTUS, Tesla, SpaceX, etc it is certainly possible written permission has been given (although I agree not likely).