NFT dudes are the only people I have EVER seen using that feature, and I use Twitter daily. I also follow exactly zero NFT dudes so I don't know why I always see their spaces.
Off the top of my head, there is a big trial going on, and people are discussing details and commentary on that (with competing spaces for the defense and persecution sides). Stuff that you don't have the time to convey using traditional media.
It has gotten big enough to have politicians show up and do special shows. Thing about 2+ hours of interacting directly with the public.