> Certainly no indication they were more popular than Twitter
Twitter died a long time ago. Elon Musk bought it and replaced it with X which is a far right website that "inherited" the user base Twitter had. The reason Threads is increasing is because nobody wants to be bombarded with messages about how they, or their friends, or just people who have done nothing wrong, are subhuman vermin who need to be exterminated.
X's user numbers are inflated. Bluesky is a fraud and BS's users are catching on to that. Threads is, for better or worse, the devil you know without having fascism pushed into your feed. In 2021, there's no way it would have beat out Twitter, but with X being what it is, it's both larger than it would have been then (I suspect, actually, it'd have closed by now), and X is, in reality whatever Musk claims, much much smaller than Twitter is.
And those of us who actually don't want corporate media have our alternative and are enjoying it very much. Once upon a time I would have mentioned it and been furious at all the supposed tech experts here who freak out about "having to choose a server", but, you know what? I don't want those guys in my socials anyway. Maybe one day you'll all "get it", but I doubt it.