Sean Rad, founder and chief executive officer of Tinder Inc., looks on during the Web Summit in Dublin, Ireland on Wednesday, Nov. 4, 2015. The summit, which started five years ago with 400 technology entrepreneurs, will draw more than 2,000 startups, 1,000 investors and 650 speakers to the three-day conference this year, organizers say. Photographer: Aidan Crawley/Bloomberg via Getty Images
