Reportedly some 50 seats were blocked off to save weight for extra cargo. Suppose each person plus their baggage weighs 80 kg, that's 4000 kg. Let's say 50% of that is taken up by containers, packing, and security devices, yielding 2000 kg of gold. It comes out to 90MM USD at today's prices. A lot of money, but probably not enough to go to so much trouble.