“The entire life cycle of Usenet’s rise and fall serves as a cautionary tale for when networked products hit scale—they suffer from the combined anti-network effects of spam, trolling and other bad behaviors, and most important, context collapse. These provide a strong natural counterbalance to the viral growth and engagement loops that make the network stronger, ultimately canceling these positive forces out. Given enough time, and left untreated, they can collapse the network entirely.”