Why are there still spammers in the search results even though search engines continually delist and penalize such sites?
Well, to give you some insight into this, get the inside scoop from SEO BlackHat on Why Spam Works. Interestingly, he ripped off the content from Earl Gray’s syndyk8.com’s article on Interview with a Blackhat SEO.
From the profits they can generate, this practice would seem to continue.