It's because it's an r/196 reboot.

r/196 used to be a subreddit with only one rule: that if you visited the subreddit, you had to post something before you left. Didn't matter what it was, but it's why their reiterations in the fediverse seem to much more active than anywhere else.

Whether adding "rule" to the title was a part of it, idk, but I think that part's just a meme habit

This is off topic for this post but the community 196 has a rule that if you visit it you must post. Thus the posts with the title "rule".