Quora和Reddit是如何争取到最初的那批用户的？
https://wanqu.co/a/880/2015-02-24-quora和reddit是如何争取到最初的一批用户的？.html
http://kirjonen.me/how-quora-and-reddit-solved-the-chicken-and-egg-problem/?utm_source=wanqu.co&utm_campaign=Wanqu+Daily&utm_medium=website