Others have learned to ignore them. Since banners don't seem to be doing the job, advertisers are demanding more effective web ads. Just remember what happened when the greedy owner of the golden goose filleted the bird to extract golden eggs faster. Usually start with annoying and never-ending animation, but allow the surfer to make a choice, pick from a list, etc. Then the ads respond accordingly.
Surfers click on something they want to read.
After a brief delay, they are allowed to move on to the page they requested. Multimedia ads . Animated and video banners that increase surfers' download time enormously. And annoy them to death when they finally arrive. Ads so cleverly embedded into the content, users barely realize it's an ad.