I think the fundamental issue is lemmy is very fragmented and has a hard time building hobby communities and dumping users into the largest community for that interest. There needs to be a way to 'merge' communities across the fediverse without spreading out moderator burden. Moderators I think should be able to consent to this merger of interest communities across site lines. There also needs to be some sort of recommendation algorithm for users to find communities.
Maybe multicomms can be used as an advertisement mechanism for communities of similar interest, maybe moderators could pin a multi-community that they support?

Quick idea about how to show multicomms that are popular and thus advertise similar communities. The multicomm in the multicomm sidebar must include the community in question in the multicomm of course. Currently they just seem like a way to share a subscription list and nothing more. To prevent harassment of certain communities, moderators should be able to choose what multis are allowed to be listed in the sidebar I think.
Obviously this all requires work. I've built a lot of communities from scratch before and frankly it seems very hard here without being able to leverage algorithms and SEO to congregate people around an interest like ttrpgs, gardening, etc. You essentially have to spam your comm with anything and everything and hope it attracts eyeballs so that hopefully other people will post too. There seems to be very little passive trickle of subscribers into communities, it looks like most people just look at the front page or segment interest by new websites (e.g. ttrpg.network or lemmy.ca for canadians) rather than a overarching ttrpg community network across the whole fediverse.





