Actually, the style pages are seen by about 3000 people per day, so it is a pretty high traffic area. They are thinking that people at this site are more likely to have money then people at a tab archive. Also, they don't care if you click the banners. They have software that can tell if you clicked the banner and then bought something, which is their deal, of course.
If you are buying stuff anyway, if you could help out the Guitar Tricks site in the process, please do....
Jon