If I understand correctly, users of other fediverse things like Mastodon can follow lemmy communities (and users?) but the reverse is not currently possible. Would it not make sense for lemmy users to be able to subscribe to a hashtag or user on a mastodon instance?
so that i could see posts from those places on my lemmy front page, the same way i see lemmy posts from other instances. i guess there would need to be some mapping of reblogs+favourites to upvotes for the algorithms here, but that seems straightforward enough.