Users are already planning protest art. I personally wouldn't encourage people to join because it's more traffic for Reddit, but that's just me.
On other news, apparently requesting a subreddit now requires a 28d old account with 100+ karma.
EDIT: it's on again, since 20min ago:
The only two recognisable things are the "fuck spez" and nationalists spamming some government flag.
EDIT 2: better view:
I think that the meaning of the sentence in German up there should be rather obvious. It's on-topic.
Because they are seeing the threat that places like Lemmy are providing to users. They need to draw people back to Reddit and distract from the protests that are still a topic.