I wouldn't pay 1 penny (total, never mind as a recurring fee) to use Twitter:
A) there are (or will be) free alternatives (Threads isn't that bad, and improving, and also much less toxic than Twitter)
B) I don't trust Elmo with my credit card details. Period.
Seeing Twitter go behind a paywall would be the best thing to happen to it so that the mainstream media can forget about it, and it will die a slow death.
Those that are stupid enough to pay for it will continue to enjoy their toxic echo chamber, with even dodgier advertisers than there are now (all the big name brands appear to have left the platform based on the absolute junk I'm being shown).
God knows how he expects to attract new users to his pay-to-use platform when everyone has forgotten about it - I guess he'll need to advertise it (ironic).
Or maybe it will be free to Tesla owners, LOL.