Feature: 100% discount coupons now offer a free one-time user upgrade
This version adds a major new feature; one-time free user upgrades via 100% discount coupons!
The most frequently requested feature in v1.0 was the ability to provide a 100% discount via a coupon to enable free user upgrades. At first, this feature did not exist because I believed people were requesting recurring subscriptions at 100% discount, which is not possible.
After receiving clarification, the feature has now made its way into the product.