That’s the problem with paid apps... but I also believe now it’s a problem with devs not validating the app receipt to check for refunds and prevent access.
For in-app purchases, up until a few years ago, users would always have access to them (even after a refund) then it followed the same rules as paid apps - access always maintain but one couldn’t restore.
Subscriptions however are unique as a server would constantly check the receipt from Apple, which would show a refund flag, so you could block access. Now they even send you a push notification to your server to indicate a refund.
With iOS 14, in-app purchases will get a “notification” when a user receives a refund on device (with IAP encompassing subscriptions).
For in-app purchases, up until a few years ago, users would always have access to them (even after a refund) then it followed the same rules as paid apps - access always maintain but one couldn’t restore.
Subscriptions however are unique as a server would constantly check the receipt from Apple, which would show a refund flag, so you could block access. Now they even send you a push notification to your server to indicate a refund.
With iOS 14, in-app purchases will get a “notification” when a user receives a refund on device (with IAP encompassing subscriptions).
So it’s getting better. Not perfect. But better.