Context
Reddit is purging NSFW subs as well as trans-related subreddits
And a screenshot of the post on Reddit, from which the meme is quoting:
Brace for Rexxit 2.0. This is not drill! Granted, most of the Redfugees will be going to Lemmynsfw (I helped by dropping a link in, we'll see if that lasts) but as long as we get them out... I suppose you could call it missionary position work.
Reddit suppresses discussion of alternatives and usually bans links.
It can vary. lemmy.world and join-lemmy links are often removed, to the point I think some subs flag them automatically. Links to other instances see solid. I just checked and I have made a dozen posts on Reddit with links to Lemmy in the last day and they are all still up. I will push my luck too far soon though, I'm sure.