Like a number of Neocon-supporting accounts here at FR which get activated for specific purposes (such as trashing Trump or supporting the Ukraine War), I suspect Musk knows that these dormant accounts are waiting to be activated to ‘manufacture support’ for whatever new causes the Left wants.
It’s GREAT to see them going away and it will be a LONG TIME before the Left can get anywhere that number of new accounts.
#4 I have noticed this whenever it is an election year. People / bots you never heard of start posting and always in support of the democrats.