Right now we can advertise on DuckDuckGo via the Bing/Yahoo network. This has two major disadvantages for DDG and it's users:
1. Yahoo/Bing end up tracking us, which we as DDG users are trying to avoid!
2. Advertisers that want to target DDG have to waste 99% of their ad spend on Bing/Yahoo searches to get 1% of it to show up on DDG, thus supporting other search engines that we don't want to support.
Users wouldn't have to be tracked to support a simple one-ad-per-page advertising system. You'd just report page load #818371919 clicked on ad #18218. With the ads not being syndicated on other sites (like AdSense does), nobody has any motivation to do click fraud.
I humbly request you seriously consider it.