Google AdSense, Amazon, Media.net etc. all seem to run targeted ads, ones that set web beacons or cookies to follow users around and target advertising based on their browsing habits.
Is there an ad exchange that displays non-targeted banner or text advertisements? Maybe one where the site operator can declare the content area of the site to provide meaningful categories for ads to be drawn from (or explicitly set the ad categories desired from some choices)?
The only thing I'm aware of is Brave.com, a browser that blocks ads by default and allows micropayments directly to publishers.
This is nice but requires users to switch their browser, a big ask. Can anyone recommend me privacy respecting ad exchanges instead? It would be fine if the ad exchange monitored what ads perform well on the site and adjusted accordingly - I'm concerned about advertising that tracks users.