I am now trying to implement offer codes, and when i enter the code in the SKPaymentQueue.default().presentCodeRedemptionSheet() its just giving me the response "Cannot redeem code the code you entered could not be found" Are you going to reply to this thread?!

When you refer to "existing customers" what exactly does that mean in this situation? Is it a user that currently HAS an active subscription? And therefore a lapsed customer is one who previously had a subscription, but no longer has one active? I am trying to generate codes internal to my platform (not on Apple) where ANY user, regardless of whether or not they've had a previous subscription (that does not currently have an active subscription) can enter the code in my UI to unlock a discount offer created under the renewable subscription. So if I am a new user, or one that has had a previous subscription that is no longer active, I can enter "ABCD" and instead of the $24.99 monthly subscription, they pay $4.99 for the first month, then $24.99 after. Your documentation states that only users that have has a previous subscription that is no longer active is determined by Apple to be eligible for promo codes. So if I am trying to maintain my own external codes, there is no way for the same code to work for both new AND expired subscription users?!