I'm looking to remove an active IAP subscription with users currently subscribed. From what I can tell on removal (no longer cleared for sale then deleted) the users will no longer be charged on the next renewal date. The product in question is going to be free from now on though so users still have access to the product as per the terms. From the documentation though I cannot tell if Apple alerts users to this update, it would be useful to know so we can manage the users experience of this change in our marketing.