One of the interesting things I've seen on the fediverse:
blahaj.zone run both a #calckey and #lemmy instance under the same domain/community. (I learnt this by running into @ada on lemmy, who is also @ada on calckey)
I don't know how effective it is in practice, but it sure seems like a great way to foster more diversity and richness in the fediverse experience, especially if some integrations can be built, like mutual ids.
