George, the owner of "Tzatziki Greek Restaurant" offers a social coupon deal: $20 to spend at his restaurant for only $10. If Tzatziki customers usually spend considerably more than $20, then he will make some money on the deal.
Andrea operates "Tough as Nails," which specializes in spa-quality manincures and pedicures. She knows that more than half of her mani/pedi customers also buy lotions and nail products for use at home. She feels that the sales of these products will offset the loss she takes on the half-price manicure service.