How do you algorithmically manipulate those 12M people with Mastodon?

The usual way, whatever that is. What would Mastodon do about it? How do you manipulate Bluesky?

BTW, Bluesky has almost 40M users.

It’s the number in OP, so I ran with that. The fediverse number apparently excludes Gab and Truth Social. Makes sense, since those aren’t federated with the rest, but that also shows an issue.