AutoBillItems within a single AutoBill, or multiple transaction items on a single Transaction, it will count as a single Redemption. If a Coupon Code is applied to multiple AutoBills, or multiple Transactions, it will count as multiple redemptions. (Applying a Coupon Code to a single AutoBill at multiple points in time will also count as multiple redemptions.)
For more information on generating Coupon Codes, see Working with Campaigns in the Subscribe Programming Guide.
CouponCode Object
Created by Subscribe in response to a Generate Coupon Codes request, this object stores the randomly generated string Codes for the Coupon Campaign.
Each coupon code may be redeemed a fixed number of times. When a coupon code is applied to multiple

