Yahoo has teamed up with Adobe to nestle pay-per-click ads into PDF documents, CNET reports. Functioning a lot like Google’s text ads, they’ll be dynamic and key-word matched, so they can change at any time, but should stay relevant. Don’t worry, they won’t appear on all PDFs—only when publishers ask Yahoo to put them there
They also won’t appear on document print-outs. So far, a handful of content producers have signed up, including Wired, InfoWorld and Pearson’s Education. Publishers get a cut of whatever ad revenue is generated, as do Yahoo and Adobe. There’s no way to choose which ads appear, but publishers can block certain websites, cutting out competitors.