It's not all expensive scammy ebooks, but "most" is probably an accurate assumption. I've actually purchased some useful software from a company using clickbank, but for the most part it's a strange part-pyramid scam type of thing with ebooks that tell you how to make your own part-pyramid scam business.
And there is a bit more details in the URL (ZIP code): http://hypnosiscertified.com/nlp/july152010.php?item=18&cbre...