I would have to disagree there. The TechCrunch audience is a relatively self-selecting group of technology and startup enthusiasts. This is valuable. There are companies that want to reach these people.

Huffington Post, I imagine, is mostly liberals of all genders, income, and level of education. I think there are far fewer companies that want to reach all of HuffPo's diverse readership.

Consider why popular, prestigious sites like washingtonpost.com have ads for Mesothelioma lawsuits and home mortgage refinancing.