You're conflating "quality" for correctness, which is not what I said. Yes, astrology being popular means it is high quality entertainment value. Cold viruses

You're conflating "quality" for correctness, which is not what I said. Yes, astrology being popular means it is high quality entertainment value. Cold viruses being popular means they are high quality reproducers. And for Facebook, whose primary value is from network effects, popularity indeed means it is a high quality social network.