[aglionby]

Dominos in the UK has similar incentives but put in place less rigidly - any medium/large pizza will run you £18-£20, but there are loads of 40%-50% discount above £x (x >= 35) or 2-4-1 deals. This makes it more difficult to justify a solo order (unless you get 2 pizzas, which, fair enough) and incentivises ordering with friends or not at all.