The airline industry is headed for record revenue this year — $996 billion — as the demand for travel soars. But the margins remain razor-thin. According to the trade association IATA, total expenses for airlines are projected to reach $936 billion, with earnings coming out to around $6.14 per passenger. That’s about the price of a latte in NYC. In a push to bolster profits, more airlines are turning to controversial dynamic pricing tech, which prices fares and amenities variably based on a trav...