I have a couple posts on reddit that didn't receive a lot of comments but every week or so it'll get a comment that is some GPT-powered bot going, "<topic of post on reddit>? Wow! That's really thought provoking, I wonder about why <topic of post on reddit> is important," and so on, asking me very obvious questions in an attempt to get me to feed the system more data.

I wouldn't be surprised to find out these bots are actually being run by reddit to encourage engagement.