I have tried using adwords and many other online methods of promoting Clickbank products... I have found that banner ads work better than adwords...now I have found another method that works better than banner ads! -- tiny newspaper classified ads, sorta like those late night Don Lapre TV commercials only I am using ClickBank and other online affiliate links as my product. I have written more on this on my website at classifiedriches(dott)com
this is something ive been doing. i just placed a cover ad for a site of mine on a local newspaper and their website. it will get 40k prints in one week, plus 1.5 million pageviews per month on their site, of which im posted in the classifieds area for 1 week. it can be an effective marketing tool for the right type of cpa or affiliate program, bc you are grabbing ppl to take direct action and goto the site, they are much more likely to convert to sales.
I can see this working well for hosting and business start ups information as well. Great idea for sure, funny how many old school marketing techniques start to come back when online saturation peaks.