So the elephant in the room: How much of HN is bot generated? Those who know have every incentive not to share and those who don't have no way to figure it out. At this point i have to assume that every new account is a bot
A less publicly-visible motive would be if they were building up accounts to use for paid-upvote schemes.
Why do you say that?
Digg's recent shutdown message talked about how bad and aggressive bots were. I'd love to see Kevin and Alex post in depth about lessons learned, Dead Internet, and call out social sites.