Have you considered an alternate explanation that Twitter’s moderation policies reflect the desires of its users?This looks like wishful thinking. Twitter was becoming this cesspool before the election and most people were not abandoning it. It was only after the election and the mob storming the Capitol that they banned trump and 70,000 QANON accounts, and more people didn't start using it after the cleanup. If anything Twitter engagement is down since the cesspool purge.
Failed attempts to start competing GQP friendly platforms tell us nothing about how less moderation would affect twitter.
If you attempted to start an even better moderated Twitter competitor, it would also fail, because of network effects.
People really seem to struggle with the idea that maybe these Twitter clones failed because they didn’t offer something the market wanted.