What I would like in a new kind of Ad network: - all ads are responsive HTML5 ads - all resources are loaded over HTTPS - ads are based on your content, not on a profile of the user - ads can be requested server side by sending the URL where the ad will be displayed through an API. The response contains the ad code, as well as the expiration date - if you want, you can even download a package with all resources so ad…
But the key requirement for an ad network is that it makes money. I am optimistic that your system would produce user-friendly sites that would, given good content, eventually develop a positive reputation, earn more traffic, and make more money than their competitors. But that requires long-term vision and user-first business ethics, which most companies are not very good at. At any time, once that reputation and traffic pattern was established, switching to a more aggressive ad network would make the site or ad seller more money. Then it would dip back down as users reacted, but I am not convinced that a sufficient number of businesses would have the wherewithal to see it through.