How to apply a custom coupon to a WooCommerce Subscription recurring amount?
I have managed to find a way, but welcome a better one. As mentioned in the OP comments, the function remove_coupons() in class WC_Subscriptions_Coupon in file woocommerce-subscriptions/includes/class-wc-subscriptions-coupon.php is removing coupons that are not ‘recurring_fee’ or ‘recurring_percent’. There is no filter added we can tap into to assign our own custom coupon types, so there does … Read more