Airlines offer "denied boarding compensation" primarily because they intentionally overbook flights to maximize revenue. Carriers use sophisticated algorithms to predict "no-shows" based on historical data; if everyone actually shows up, the plane has more passengers than seats. Offering vouchers or cash to volunteers is a high-value strategy for the airline because it is significantly cheaper than the legal penalties and "bad press" associated with an involuntary bump. In 2026, DOT regulations in the U.S. and EC 261/2004 in Europe have made the penalties for forcing someone off a plane very expensive (up to $1,550 or €600). By starting a "bidding war" at the gate, airlines can often find someone willing to wait for the next flight in exchange for a $500 travel credit, which costs the airline very little in actual "real world" money. For the flexible traveler, this is a peer-to-peer "win" that can fund an entire future vacation, provided you don't have a strict deadline at your destination.