and more from Travel Weekly: Sampson said many companies also were willing to do demographic research on passengers, provided the airline provides access to its basic data for analysis. An analysis would give airlines another way to pitch themselves to other companies. There is no guarantee that every ancillary revenue gambit will work. Sampson expressed skepticism about the potential for gambling, which may only appeal to a small segment of travelers, and about cell phone service, because people may worry how fellow passengers will react. "In the retailing space, you need to make sure you are marketing to customers who are going to buy it," Sampson said. That means selling items on flights that you believe passengers will be predisposed to buy.