This also is absolutely rampant on reddit in the past months.
I’m not a heavy Reddit user but I’ve noticed a sharp increase in comment spam disguised as real discussion. I think the turning point was when they allowed accounts to hide their comment history. Before, when you could click on an account and read all of their other comments it was easy to tell when an account only existed for fake conversations about a product they were spamming. Now the spam accounts hide their com…
It's maybe account laundering, but on any popular post you'll see at least half of the comments are tangential at best. They're not an expression of anything a person would express, like replying with just skull emojis to a random news post, or saying "he really said" with an exact word to word recreation of a throwaway quote from a video. No one ever replies to these posts, they get like 2 upvotes (if that), the platform doesn't reward them at all but they constantly appear in a very artificial looking way.