HOW REDDIT BUILT THE INTERNET'S BEST COMMENT SECTION

Summary from the TLDR Marketing newsletter

Reddit turned its comment section into the platform's main feature. Its design combined upvotes, karma, and nested threads to make discussions scalable, helping it reach over 100K active communities and 2.7B comments a year. The upvote system prioritizes quality over timing, keeping conversations dynamic and rewarding meaningful contributions. Karma and threaded conversations further motivate users to create and explore content in depth.