Blocking a sale because the receipt server is down is also not doing it right. If you have a client-only IAP (i.e. no server component) any pirate worth their s

Blocking a sale because the receipt server is down is also not doing it right. If you have a client-only IAP (i.e. no server component) any pirate worth their salt is going to disable it, so you may as well be lenient about validating receipts or cache them to retry later.