Oh great: Steve Baker has an example of another sub-human species that has crawled out from under a rock. Blogger-bots that generate spam blogs.
“when you have hundreds or thousands of these spam blogs, and machines are running them, the economics are far different.”
I’m guessing they’re intended more as a means to generate Google juice for another website. If that guess is correct, the AdSense ads appearing on the page is not the primary reason for their existence.