The moment the waiter heard that we wanted to redeem our burpple deal, he showed us another menu that is 1.5x more expensive than usual price. Furthermore, the prices for the food and drinks are separate, so we have to order drinks to redeem our Burpple and pay for the overpriced drinks.
Burpple is just a marketing gimmick for them to attract people to come to their store and charge them a higher price for it.