When Google proposed purchasing DoubleClick for $3.1 billion in 2007, fears that it would build the ultimate mousetrap for online ad spend were such that it took a year of making assurances for the U.S. government to approve it. Google's promises at the time included its commitment to open market competition and a pledge that users of its platform would retain control and continue to enjoy a level playing field. However, documents and witness testimony now provide a glimpse at what's happened since then.