I think that was the gist behind the "Niche Social Networks are not Businesses" section near the end. His friend was brought on as a cofounder because he believ

I think that was the gist behind the "Niche Social Networks are not Businesses" section near the end. His friend was brought on as a cofounder because he believed that business knowledge would be important. He learned that, at least in his case, having a "business knowledge" person was not very helpful in getting the site off the ground.