To see these systems like massive hydro-generation plants, you first have to assume that human attention for advertising is an infinitely-renewable resource. R

To see these systems like massive hydro-generation plants, you first have to assume that human attention for advertising is an infinitely-renewable resource. Revenue is certainly increasing rapidly in recent years: http://www.iab.net/about_the_iab/recent_press_releases/press_release_archive/press_release/pr-061115 http://www.iab.net/about_the_iab/recent_press_releases/press.... Maybe there is no ceiling in sight.