Stacey Bendet Eisner, CEO and Creative Director of Alice + Olivia, goes for a walk during the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Brian Chesky, cofounder and the CEO of Airbnb, walks with Elissa Patel during the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Jack Dorsey (L), interim CEO of Twitter and CEO of Square, talks with YouTube CEO Susan Wojcicki (C), as venture capitalist Vivi Nevo (R) walks with them during the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

GoPro CEO Nick Woodman arrives for the annual Allen and Co. media conference Sun Valley, Idaho July 7, 2015. REUTERS/Mike Blake 

Anthony Noto, chief financial officer of Twitter, walks up a flight of stairs behind Snapchat CEO Evan Spiegel during the first day of the annual Allen and Co. media conference Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Tesla founder Elon Musk walks with his wife, British actress Talulah Riley, during the first day of the annual Allen and Co. media conference in Sun Valley, Idaho, July 8, 2015. REUTERS/Mike Blake 

Apple CEO Tim Cook walks with CBS Corporation CEO Leslie Moonves (R) and Eddy Cue, Apple's senior vice president of Internet Software and Services (L) during the first day of the annual Allen and Co. media conference Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Barry Diller, Chairman and Senior Executive of IAC/InterActiveCorp and Expedia, Inc. walks with his wife Diane von Furstenberg as they arrive for the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Alexander Karp, American billionaire businessman and co-founder and CEO of the software firm Palantir Technologies arrives for the the annual Allen and Co. media conference Sun Valley, Idaho July 7, 2015. REUTERS/Mike Blake 

Peter Karmanos, Jr., majority owner and chief executive officer of the Carolina Hurricanes, arrives with his wife Danialle for the first day of the annual Allen and Co. media conference in Sun Valley, Idaho, July 8, 2015. REUTERS/Mike Blake 

Sheryl Sandberg (L), Chief Operating Officer of Facebook, arrives with Lorna Borenstein for the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Warren Buffett, Chairman CEO and largest shareholder of Berkshire Hathaway attends the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

21st Century Fox CEO James Murdoch walks with his wife Kathryn as they arrive for the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Mark Pincus, CEO of Zynga (L) chats with Michael Ovitz, former Disney CEO, as they meet while arriving for the the annual Allen and Co. media conference Sun Valley, Idaho July 7, 2015. REUTERS/Mike Blake 

John William Henry, principal owner of the The Boston Globe, Boston Red Sox and Liverpool Football Club, arrives with his wife Linda for the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Eric Lefkofsky, CEO of Groupon, arrives for the the annual Allen and Co. media conference Sun Valley, Idaho July 7, 2015. REUTERS/Mike Blake 

Disney CEO Bob Iger walks with his wife Willow Bay as they arrive for the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Leslie Moonves, President and Chief Executive Officer of CBS Corporation arrives for the annual Allen and Co. media conference Sun Valley, Idaho July 7, 2015. REUTERS/Mike Blake 

Muhtar Kent, Chairman of the Board and Chief Executive Officer Coca- Cola Company walks with his wife Defoe as they arrive for the first day of the annual Allen and Co. media conference Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Activision Blizzard CEO Robert A. Kotick (R) chats with NBC Universal Vice Chairman Ron Meyer at the annual Allen and Co. media conference Sun Valley, Idaho July 7, 2015. REUTERS/Mike Blake 

Jeff Bezos, founder and CEO of Amazon.com (R), arrives for the first day of the annual Allen and Co. media conference, with television personality and journalist Charlie Rose, in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Rony Abovitz, CEO of augmented reality startup Magic Leap, waves during the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Elizabeth Hughes Eginton, Chief Marketing Officer at Latham & Watkins, bikes with Chris Davis as they arrive for the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

21st Century Fox Executive Co-Chairmen Rupert Murdoch (L) and his son Lachlan attend the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Twitter's CFO Anthony Noto (C) walks with Facebook's CFO David Wehner (L) and Vice President of Partnership Dan Rose (R) during the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Verizon CEO Lowell McAdam (R) talks to New England Patriots owner and The Kraft Group CEO Robert Kraft during the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Jerry Yang, co-founder and former CEO of Yahoo arrives for the the annual Allen and Co. media conference Sun Valley, Idaho July 7, 2015. REUTERS/Mike Blake 

Film and television producer Brain Grazer walks with Veronica Smiley during the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Jerry Reinsdorf, Chicago Bulls owner, arrives for the annual Allen and Co. media conference Sun Valley, Idaho July 7, 2015. REUTERS/Mike Blake 

Walt Disney Company CEO Bob Iger (L) walks with Co-chair, Disney Media Networks, and President, Disney/ABC Television Group, Ben Sherman (C) and Disney COO Tom Staggs during the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Former Twitter CEO Dick Costolo arrives for the the annual Allen and Co. media conference Sun Valley, Idaho July 7, 2015. REUTERS/Mike Blake 

Robert Marcus, chief executive officer and chairman of Time Warner Cable Inc. arrives for the annual Allen and Co. media conference Sun Valley, Idaho July 7, 2015. REUTERS/Mike Blake 

Chris Silbermann, President of International Creative Management, Inc. arrives for the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Howard Stringer, former Sony Corporation CEO, attends the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Stan Kroenke (L), owner of Kroenke Sports Enterprises, walks with Malaysian businessman and philanthropist Ananda Krishnan during the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Donald Edward Graham, CEO and Chairman of Graham Holdings Company arrives for the the annual Allen and Co. media conference Sun Valley, Idaho July 7, 2015. REUTERS/Mike Blake 

Philippe Dauman, President and CEO of Viacom, walks with his wife Debbie during the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Kenneth Gerard Langone Sr., co founder of The Home Depot arrives for the the annual Allen and Co. media conference Sun Valley, Idaho July 7, 2015. REUTERS/Mike Blake 

John Donahoe , President and CEO of eBay Inc, walks with his wife Eileen as they attend the first day of the annual Allen and Co. media conference Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Former commissioner of Major League Baseball and chairman of the U.S. Olympic Committee Peter Ueberroth attends the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Reid Hoffman (L), co-founder of LinkedIn, talks to Bing Gordon, former Chief Creative Officer of video game publisher and developer Electronic Arts, during the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake 

Tim Armstrong, CEO of AOL Inc., attends the first day of the annual Allen and Co. media conference in Sun Valley, Idaho July 8, 2015. REUTERS/Mike Blake