Earlier quoted context omitted.
That's the point? Customer service is lacking this basic functionality, so this developer is providing it on the side at an increased cost.
Its not lacking. it is easily possible for users to get refunds from apple. I have no idea why the developer isn't just asking them to go to apple for a refund.
I'm not this developer, but if so many users are reaching out to them for refunds, then there is a definitive gap in store functionality.