Earlier quoted context omitted.
Mastodon already won, by being used by people. Bluesky also won, by also being used by people. Not sure if this is a "winner takes it all" scenario? As long as you can host it yourself, I don't really mind where people are, both seem to work and have "won" for what they set out to do.
It is a zero-sum game in some sense, because you go where your friends or "influencers" are. Mastodon ended up losing its user base to Bluesky during the early Twitter exodus because many influencers and journalists wanted to have an "elite" status and a special relationship with the platform, so they preferred a platform owned by Dorsey to some hippie open-source thing. Bluesky, in turn, ended up losing back to Twit…
I believe, due to the format of engagement, its easy to spend a lot of time there scrolling - so consider
(1) only using the platform on your desktop computer, instead of phone,
(2) limiting time - 25 minutes a day is enough!
(3) Mute spammers, complainers, people with negative attiudes - you can't catch them all, but you can intentionally shape your experience over time.
(4) Subscribe to tags of your passions (example: #piano, #makerspace, #drawing, #cats, #jujitsu, #cncrouter, #3dprinting), and try to lean into that instead of getting caught up in endless political reactions - which never ends. You can be intentional, and subscribe to people who have a positive vision for the version of the future you prefer.