Most publishers cram their websites with ads. The number of low-content, click-baity websites is just staggering. Sometimes I wonder how could this even be a profitable proposition for advertisers. This is one reason why Google absolutely dominates the space. It has the capability to deal with all the fraud, calculate the right reward for publishers, and give a meaningful ROI to the advertiser.
Maybe a new kind of advertisement medium could unseat Google from its dominance but the way digital advertising works today, it sounds like an impossible idea.