@henry I don't understand. Do you mean you have 10 different Mastodon-profiles? Why?
I'm somewhat surprised you haven't "found" more of the Swedish contingency here since you seem to live in Stockholm. I'll boost after replying.
To your point: Algorithm driven engagement is a hella powerful drug. It will take a lot of time to get off it.
That's the explanation both for why people register and then leave Mastodon, and why you got more engagement on Reddit with your post.