Traditional Culture Encyclopedia - Hotel franchise - What unknown "consumption upgrade" traps have you encountered?

What unknown "consumption upgrade" traps have you encountered?

During May Day, there was a kind of fish in a restaurant in Pattaya, Thailand. The waiter will ask you if you need help with the fish. If you let him have it, you will spend an extra 80 dollars. And when we go shopping in this supermarket, they give us this lottery ticket every time.