Got this crazy idea. Could use some input I got a site similar to those pr checker sites where you can add their code to show your sites PR via an image. So my site generates a code that people put on their site to show an image. It also generate a link back to main site when visitors clicks the shown image. Most of the sites using the service has not removed the link back part. Site is currently serving about 1mil images a day across 50k different sites. So here goes the idea. I could swap the generated image for a banner ad and redirect clicks to my site to add by comparing the ref and served image via a database (already collecting site info for served images in database) Say I swap maybe 1/10 generated images or maybe only swap like 5min at time across the whole day. Some webmaster would prolly find out and remove the link, but who cares I get massive banner views anyway. Any ideas on how to do it the best way and which ads types I should choose. Maybe some CPA offers would be neat. Could start with swapping 50k /1mil per day to run tests.