Digg https://en.wikipedia.org/wiki/Digg#Digg_v4 https://en.wikipedia.org/wiki/Digg#Digg_v4 Friendster http://highscalability.com/blog/2007/11/13/friendster-los

Digg https://en.wikipedia.org/wiki/Digg#Digg_v4 https://en.wikipedia.org/wiki/Digg#Digg_v4 Friendster http://highscalability.com/blog/2007/11/13/friendster-lost-lead-because-of-a-failure-to-scale.html http://highscalability.com/blog/2007/11/13/friendster-lost-l... There are, of course, others. Twitter wasn't far from meeting the same fate. That's (partially) why Dorsey was fired.