Wow. That means that FB doesn't have 600 million users but 20-30% less.
It always bothered me that they pretend that every account equals a unique user.
Good IPO luck.
This is a sample largely consisting of web developers, and people who know that you can have more than one account. That conclusion doesn't follow, in my opinion.
HN is a sampling of about 0.01% the size of Facebook. There's absolutely no way you can make the argument that they have only 20% the users they claim.
