In the past[when?] some airlines, like JetBlue Airways, did not overbook as a policy that provides incentive and avoids customer disappointment.[11] They were able to do this and remain profitable as the majority of their customers are tourists, instead of business fliers, and their tickets are non-refundable, thereby lowering the chances of passengers missing their flights. However, since 2017 JetBlue again began overbooking flights.[12]