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Pseudo Nym

Honestly confused by this. Can anyone explain this social media behavior?

If you post or boost stuff I'm not interested in, that's fine, but I might unfollow to curate my own timeline.

But I got an angry "you can't silently unfollow me and keep me as a follower!" message. Uhm, ok? But I really don't get it. Am I missing some unspoken mutual behavior?

I follow, and unfollow folks frequently. Say something interesting, boost my post, favorite something, or follow me, I'm likely to follow you.