Investors said she couldn’t make money on flights for three reasons, but she went ahead and built a profitable B2C business by debunking them. During this interview with Gillian Morris, CEO of Hitlist and keynote speaker at WYSTC 2019, Kevin O’Shaughnessy (Cityhook) explores the development, back-end workings, and magical viral coefficient of the mobile app that tells you when to fly to destinations on your travel wish list for the best price.