(Genuine question, not rhetorical)
Quite a lot of his twitter presence is reactions to the decline in America and America's politics. Musk would probably prefer King's voice quietened.
he's a famous author. he's got a website, a publisher with an advertising budget, and other social media channels. his audience will follow him. he can post on facebook, his mailing list, his own website, or none of the above.
Wait until you see how they begin marketing the subscription.. it will be ridiculous. Might as well be trying to sell snake oil.
Look at LV 'hyperloop' [0], and people who paid upfront for FSD [1] and are issuing a class action lawsuit and re-think what you just said about 'might.' I think this isn't about Tesla or SpaceX or any specific company he is CEO of as they are all amazing feats of tech/engineering, it's about Elon's horrible PT Barnum type marketing that worked for a bit but has lost all of it's luster at this point.
0: https://www.youtube.com/watch?v=htJcPEXn040 1: jhttps://www.youtube.com/watch?v=htJcPEXn040