You tip your waiter or waitress based upon service. The food they serve & service provide is not discounted or cut in half. they don’t take care of you half the time. they provide a full service to you when you dine out. they are owed the full amount of their tip regardless of what you spend. Meal coupons is simply marketing strategy in order to increase their popularity and sales of food among their new & old customers. this coupon are providing only few customers through lucky draw & strategy create big attraction of customers towards the restaurant.