When I first started driving traffic, popups and popunders seemed outdated and “cheap” to me. But then I saw a case where a popunder combination gave a stable plus, and decided to reconsider my attitude. The problem was that examples of creatives — adequate and really working — were practically nowhere to be found. The article
pop-up and popunder ads examples helped me figure it out. It explains in detail how to design such ads, which scenarios work best, and what definitely shouldn’t be done. A useful thing, especially if you’re just testing this format.