ex Cross-post material to other instances and make new sublemmies on other instances.
Im not sure how to accomplish this. In something like reddit, they could do something like upvotes from a foreign instance counts as x3 upvotes. I have my upvotes turned off on lemmy though.
Suggestions?
I think this is more of a content/curation issue than a structural one. While you might find a way to improve discovery of communities on the platform, at the moment you are able to do so with a litle effort via communities/all
Bottom line. An external instance has to have something you want that cannot be found locally. One approach - Lemmy.ml could look to curate its communites and provide a method to redirect communities better suited to other instances. This adds to the workload/interactions between admins., though.
if generalist communities like /lego are being set up on lemmy main its pretty much the flagship. I dont think the smaller generalist instances will grow.