Nothing on Reddit has anything to do with Freedom of Speech as outlined in the first amendment. The first deals with the government’s ability to prevent people from saying things and nothing to do with a non-governmental organization or individual person not allowing certain content in their platform. If anything, Musk forcing Reddit to allow the content is anti-free speech.
They have sent out three clarifying emails since the original offer email. Everyone should have waited even if yiou were considering it because the original email had ambiguity and the program was only half thought out.