I find "smile to pay" very dystopian. It's been shown that the physical act of smiling can improve mood, so I don't think it's much of a stretch that someone at

I find "smile to pay" very dystopian. It's been shown that the physical act of smiling can improve mood, so I don't think it's much of a stretch that someone at MasterCard said "hey what if we condition people to enjoy using their credit/debit card?"