AdOperator.com is a rapidly evolving ad network that adopts the Popunder, In-page ads.
Apart from all the word-of-mouth publicity and functionalities, this service integrates a very handy self-service format from where you can purchase the web traffic you need.
The service is popular for its creative and easy-to-set-up ad campaigns. Similar to any other platform across the market, you would have to test at least 3 different creatives.
Three ad formats: ads in push notification messages, ads in notification messages floating at a website (in-page), popunders (clickunders) full-page traffic.