WikiHow pages are almost all ranked high on Google somewhere. Just go to wikiHow and search for a keyword near yours and look through the results. Edit one of the entries to say they can "get a $10,000 scholarship by going here:" or "learn more about getting scholarships here:" and link to a product.
On smaller wiki pages you don't have to worry about it being reversed and you can count on constant traffic. Bigger pages it might get reversed - still not likely if pointing to an article. Either way it's a great source of traffic most people aren't using.