Fans are everywhere: from Fifty Shades of Grey to Veronica Mars, from Comic-Con to sitcom, from niche to Geek Chic, fans are becoming the most visible and important audience of the twenty-first century. For years the media industries ignored fans and fan activities, but now they're paying attention and a lot of money to develop a whole new wave of products intended to harness the power of fandom. What impact do such corporate media efforts have on...