Got one of those "we want you to buy reddit stock because you reddited really hard!" emails... on an account I haven't used for six years. When I did use it, I used it almost exclusively on a niche subreddit, too.
They're scraping the bottom of the barrel already 
This is in the dunk tank to dunk on me for once using reddit
There are a lot of specific media subs (i.e stuff like Noita or Pathfinder) that don't have an active fediverse equivalent, too.