Moderators also ensure quality, by removing posts that don't follow rules. For example, /r/ExperiencedDevs is one of my favorite subreddits. They have rules ar

Moderators also ensure quality, by removing posts that don't follow rules. For example, /r/ExperiencedDevs is one of my favorite subreddits. They have rules around the types of questions you can ask. These rules are put into place to prevent the subreddit from becoming like /r/CSCareerQuestions, or to prevent an influx of memes. Without these tools or these moderators, I have a feeling some subreddits will become more generalist and possibly drop in quality. I go to /r/ExperiencedDevs (and other subreddits moderated in a similar fashion) for a very specific set of posts and expectations for questions. I don't really want to see memes, jokes, etc. in the subreddit, as I have other ones to go for that.