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"[The OPEN Act's] approach targets foreign rogue sites without inflicting collateral damage on legitimate, law-abiding U.S. Internet companies by bringing well-established international trade remedies to bear on this problem," wrote AOL, eBay, Facebook, Google, LinkedIn, Mozilla, Twitter, Yahoo and Zynga in a letter to Issa and Wyden last month.

The OPEN Act has attracted strong support from Silicon Valley, but criticism from the entertainment industry, which claims it wouldn't effectively prevent piracy. The content industries have argued the ITC moves too slowly and its rulings often favor tech companies over content providers.