I barely use twitter these days. The platform is falling apart. If you aren't a paying subscriber you will be deboosted, blue checkmarks are the ones that get raised to the top first. I also resent having to wade through a sea of bot garbage that aren't even real people. Just algos from Russia and other lovely places that are programmed to pop up and froth and foam if they see a keyword.
Old twitter was fun though, back when it was real people.
It also isn't a charity venture even though he is quite rich now (owns Square, etc.) It is a corporation, so it will be set up to monetize in some way. I like to think that people are getting sick of being the product for some corporation.
Pretty sure that a large # of those "people" you refer to are actually bots. If they're mostly noise and mostly tied to something political they're probably a bot. Take a look at a sampler. If they only seem to pop-up whenever Biden is mentioned or only ever talk about a single thing especially at odd times of the day..
I just follow a few interesting people for whatever topics I want to follow. In fact the “for you” page has been giving me decent recommendations lately.