Just to defend OP a bit, there's been a increase of potentially bot-like posts that look "normal" across various subreddits for the last couple weeks that have gotten some users suspicious, and reddit seems to promoting more self-posts than normal, even ones that haven't been upvoted. So, unusual activity is happening and many users are noticing it. That being said, the old default subs have always had issues with bots, but those were generally link posts, this may or may not be related.