The car in the atrium

Every Dubai summer has a car in an atrium. Roped off, polished, turning slowly, with a spend threshold to reach first.

Notice the month. The corridors are at their emptiest, half the residents are out of the country, and this is when the largest prize of the year goes on display.

That is not generosity. It is what the mechanic costs.

A raffle is a fixed cost. One car, or one kilo of gold, bought once, and the bill is identical whether ten thousand people enter or ten. So the emptier the month, the better the arithmetic reads: the prize is paid for in advance, and whatever footfall it produces arrives at no extra charge.

A discount is the opposite. It is a variable cost, charged on every transaction, and in a mall it lands on the tenant: the restaurant, the perfume counter, the toy shop, each giving up margin on every sale, including the ones it would have made anyway.

Which is why the two mechanics belong to two different fears.

A discount is what you run when you are afraid of the shop across the road. It moves a customer who was going to buy from somebody, and it moves them this week.

A raffle is what you run when you are afraid of an empty corridor. It does not mind who wins. It needs a reason for a family to spend two hours indoors, in the only weeks of the year when indoors is the whole proposition.

Generosity that costs the same whether one person accepts it or ten thousand is a media buy with a bow on it.

The prize is what a promotion says. The mechanic is what it admits: whose money is on the table, and what the person who put it there is worried about.