Ben Edelman (Harvard, Microsoft) published a study [0] about how dark patterns in the online travel industry help them reach margins up to 25%. He also mentions

Ben Edelman (Harvard, Microsoft) published a study [0] about how dark patterns in the online travel industry help them reach margins up to 25%. He also mentions the consolidation where most well-known booking sites are owned by just two large groups. [0] http://www.benedelman.org/impact-of-ota-bias-and-consolidation-on-consumers/ http://www.benedelman.org/impact-of-ota-bias-and-consolidati...