If the spirit of the fediverse is to spread everything across small instances, then i think it would be really important to make communities, especially niche communities, easier to discover across instances. Since it is not planned to crawl federated instances community catalog, i think instance admins, or maybe even the lemmy software itself, should point more obvious to services like https://lemmyverse.net/communities to search for communities instead of the lemmy (or mbin, piefed) internal search. It’s been a while since i have seen someone talk about these community crawler services.
Instances that don’t federate a remote community won’t even list this community in the user profile of a moderator.
Thanks for the trendingcommunities tip, subscribed it. It uses the lemmyverse crawler, so that is really good.
The problem with the mbin “random C’s” is, i guess, that it’ll only ever show c’s which are already being federated, so already discoverable from the internal search.