If one wanted to spin out a series of sites that covered a variety of topic verticals with the purpose of garnering revenue from banners, specifically Adsense advertising, which verticals are the most profitable? After Tech and Investing I'm just not sure nor am I sure how to even produce a list like this without exhaustive GA keyword research. I've done a great deal of web searching but just can't find a compiled list. This seems extremely strange to me because I bet you every ad exchange can tell you what type of content ads bring them the greatest revenue. Anyway looking for advice from the BigGuns on this or where to find a list like this.