Another focus is online-ad networks, which media companies say help finance piracy by placing ads on sites that traffic in unauthorized content. A study last summer, commissioned in part by Google, found that 86% of peer-to-peer sharing sites are dependent on advertising for income.
NBC’s special unit said it recently discovered advertisements for Blockbuster and the U.S. Forest Service on cyberlockers that had trafficked in its content without permission. The ads had been supplied through Google’s AdSense, which places ads related to keywords.
Blockbuster said it had “policies and controls” to stop improper ad placement, but called it an “ongoing challenge.” The Ad Council, which handles ads for the Forest Service, said any time its ads ran on questionable sites, it requested that they be taken down immediately.
After a request from NBC, Google removed the ads, said NBC Universal’s Mr. Cotton.
A Google spokeswoman declined to comment on the ads but said that, as a policy, AdSense ads aren’t supposed to be displayed on sites that contain or link to copyright-infringing content. She noted that the company disables “thousands of accounts proactively, as well as at the result of requests.”
Read more here : WSJ - As Pirates Run Rampant, TV Studios Dial Up Pursuit