Exactly, and there are a huge number of $4 sites out there and a large number of companies providing that kind of outsourced content generation. If you've got $100k in funding to blow, it's really easy to get your first 10,000 pages of content and a stream of SEO traffic within a few months.

I agree with Ryan that these kinds of sites are worse than scrapers because they're just as useless but algorithmically much harder to detect.