Not all airlines overbook. Case in point, JetBlue, which as a practice does not overbook. United heavily overbooks, which is closely related to their practice o

Not all airlines overbook. Case in point, JetBlue, which as a practice does not overbook. United heavily overbooks, which is closely related to their practice of trying to offer the cheapest tickets on major competitive routes. United lost over $2 billion last year. JetBlue made about $800 million in net income last year. So which strategy is "economically important" again?