Many--perhaps most--Web entrepreneurs have no writing or editorial skills, and they couldn't care less about content. They just want to make money, like the e-commerce guy in the Google Search News forum who recently complained about "intellectual nonsense" in Google's search results. That's why boilerplate script-generated or datafeed affiliate sites were the range a few years ago, and it's why made-for-AdSense sites and computer-generated, keyword-driven template sites ("Post your review!") are the rage now.
In a medium where the cost of entry is low and the key drivers of circulation (search engines) don't distinguish between information, e-commerce, and pure junk, it's easy for anyone with entrepreneurial instincts, minimal technical skills, and greed to make money--at least for a while.