I sometimes wonder why people will go on reddit and start submitting posts to random subreddits by just typing a keyword into the subreddit bar and picking everything that sounds tangentially related without actually going to that subreddit.
/r/aurora is a subreddit for a 4x game/simulator (it's rather old so they got the name early), but any time there's a widely visible aurora, mostly in the US and Canada, it gets spammed with people's photos of the aurora.