I was thinking about the idea of adding "community ambassadors" to https://fediverser.network. The plan would be for people already on fediverse to tell which subreddits they miss the most, and then help them promote the Lemmy alternative by, e.g, listing which reddit users are the most active and send a customizable message showing them how to migrate. I haven't done it yet because I'd like to have other instances besides alien.top to share the influx of potential users.