Contract cheating. You pay someone to write your dissertation for you and hope that nobody notices. If you google "dissertation writing service" you'll see loads, and they all say roughly the same thing. They offer a quality product, written by professors or graduates in their weekends off, they offer a plagiarism check and so on.
What they don't say is that what they provide is generally terrible. The cases I have seen (for dissertations, essays and the like), the quality of the answers is usually abysmal. Particularly with the "data sets" provided.
One recent one had the question "What is your occupation?" as part of a survey. The possible answers? Student, Business or Job.
And also, there is a ton of dross written also. Take this article from Yahoo Finance (offering advice on the best services).
Just nonsense. Utter, utter nonsense.