Thanks for pointing out this new trend. After reading your comment quite a few such "niche" advertising websites and models came to mind. Maybe I will write an

Thanks for pointing out this new trend. After reading your comment quite a few such "niche" advertising websites and models came to mind. Maybe I will write an article about it in the near future. On a personal note as a user I'm more inclined to purchase a course or a report from such a website rather than from an ad on a big website. Thanks EDIT: Also what I tried pointing to is relevant advertising. The networks I mention are probably one of the many but at least they target specific niches.