DoubleClick ухитрился запатентовать показ баннеров посредством баннерных сетей. Точнее, патент называется "Method of Delivery, Targeting, and Measuring Advertising Over Networks"
Как заметил кто-то на Slashdot'e:
Doubleclick? Doubleclick? I'm trying to remember who they are. Lemme look in my hosts file... oh yeah. They're those guys at 127.0.0.1 whose banners never seem to load correctly. Oh well.