Auster

And if the user uses Mbin instances, he/she can even block posts that link to other domains, as often political posts link to news sites.

And some times, having the initiative to create such more specific communities could be a change factor for the growth of a social media. Also, with federation, not just the person can choose where to create the community on while not making it a walled garden as other sites would still have access to it, but also if a community for the given subject already exists but the user thinks he can do better, he/she can more easily do it with how expansive the “fediverse” is.

Growth is a process, not an immediate switch. Every social media started small and then grew. If immediatism, or however it is called, was the predominant factor for any struggle to become an achievement, nothing would be achieved.

And on lack of contents, I, for one, block everything that is not of my interest, quite a lot to be honest, specially with certain niches spamming the federated platforms, but even then, I get a feeling I should trim even some of the communities/magazines I follow/subscribe to as I can barely catch up to those already.