Comment by umbra07

the issue is that it's very hard to even let their desired audience know that they exist.

the only feasible way (short of like, scraping every comment made on a subreddit and dm'ing each of those users) to reach the audience you're trying to convince to switch to your alternate subreddit is by... posting on the original subreddit. the original subreddit has no incentive to allow your post, and public moderation logs aren't a thing on reddit, so...