http://gigaom.com/2011/01/07/why-google-and-demand-media-are-headed-for-a-showdown/
More recently, Instapaper developer Marco Arment joined the fray with a blog post describing how entire categories of searches seem swamped with spammy results ? including those, like Kedrosky?s search for dishwashers, that involve specific products. As he put it, massive numbers of content sites are ?generated by penny-hungry affiliate marketers and sleazy web ?content? startups to target long-tail Google queries en masse, scraping content from others or paying low-wage workers to churn out formulaic, minimally nutritious pages to answer them.?