I’m a merchant and I once won a PayPal chargeback. I sell a software product. Customer generates a key to unlock the code. Once a key is generated, that key

I’m a merchant and I once won a PayPal chargeback. I sell a software product. Customer generates a key to unlock the code. Once a key is generated, that key will unlock the product forever; it cannot be revoked, thus no refund at that point. In the dispute form, I wrote “It’s like buying a DVD from Walmart — once the cellophane is torn open...” PayPal judged in my favor and refused the chargeback of $349. I’ve had 2 or 3 chargebacks from Visa and never won those.