I have the following scenario: I had a subscription price of $10. I increased the price to $20 for new subscriptions, while preserving existing subscriptions price ($10). Now, I want to decrease the price to $15: I understand that existing $20 subscriptions will automatically renew their subscription for the reduced price ($15). BUT, what will happen to the existing $10 subscriptions? I get no option to preserve or increase their price when trying to change the price to $15.

Although [INImage imageWithUIImage:] method is documented, it doesn't exist in the actual framework (iOS 15)!