Even then. There aren't that many unhappy users for my product and I spend more time/money making them feel less angry than the money I could lose in the refund

Even then. There aren't that many unhappy users for my product and I spend more time/money making them feel less angry than the money I could lose in the refund. If enough users would be unhappy enough to request refund and and make it financially noticeable it would be time for me to take down the app and seriously redesign it.