callivert - 11:30 am on Jul 27, 2007 (gmt 0)

The audience is all wrong - the kind of person who uses Digg is the kind of person who has AdBlock.

There's a core user base with the traits associated with Digg: anti-microsoft, pro-linux, left-wing, environmentalist, gadget-obsessed, tech-literate, geeky, bitchy, nasty, etc.
But like any social organization, there's a much larger group of less committed users. Those people are more diverse, and more characteristic of general internet users.
Digg has been running adsense for a long while now. If the Digg crowd were all the hard core anti-capitalists that their stereotype suggests, the advertising wouldn't work (and Digg wouldn't turn a profit!)