While Facebook is organized around your friends, replicating your offline social network, Reddit is organized around topics. This is a model that parallels Usenet, the Internet’s ur-social network, a set of distributed message boards that served as a foundational influence on many builders of the contemporary commercial Web. While Facebook reconnects you with people you knew in elementary school or worked with years before, Reddit introduces you to strangers who share a common interest in photography, “Game of Thrones” or European politics.
When it comes to niche interests, Reddit and Twitter are the places to be. They teach. Facebook is like the old record collection, always there for a good listen but the records occasionally scratch. Everyone wants new stuff.