It's worth repeating: Facebook have only a very limited aspect of our social experience. Weaker social connections - reading someone's review, tweet, repin, com

It's worth repeating: Facebook have only a very limited aspect of our social experience. Weaker social connections - reading someone's review, tweet, repin, commenting on YC - are a magnitude more numerous than our limited circle of acquaintances. Facebook does not own the long tail of social.