Smart Coupons for WooCommerce

I’d like the ability to create coupons for products—this could be in conjunction with Smart Coupons—and then schedule their delivery independent of the subscription term.
For instance send a coupon for a free product after a 3 month membership. I can do this now if the subscription is paid every three months but not if it is yearly or monthly.

p.s. double posted in Memberships. wasn’t sure which was most appropriate.