Despite generating nearly $1tn in annual revenue commercial airlines operate with exceedingly slim profit margins. While your ticket might set you back hundreds or even thousands of dollars, airlines take less than $7.20 on average per ticket. In some regions, airlines pocket less than $2 per passenger on average. With uncontrollable macro forces like fuel costs and fluctuating demand at hand, airlines have turned to mastering ancillary services to bolster revenue and preserve profit. Seat changes, bagga ...