Here is the list they are staying with ...
Bluesky, Mastodon, LinkedIn, Instagram, TikTok, Facebook, YouTube
So, where did the audience go? It didn't go to the existing places from 20-8 years ago. And I doubt it went to the two new kids.
What this tells me is that their audience is aging/dying off, and the younger generations aren't there in numbers. This requires little to no political inferences to understand. It is easy to mistake one for the other.
Yes, I am a Boomer. I don't rely upon AI to tell me what to think. I am also a Libertarian and interested in Privacy and been a long time proponent of Open Source. Maybe figure out what intersections to the younger generations align and go there.