Subscription products are gaining popularity as Shopify has recently released the Subscriptions API's and the number of Shopify applications that offer subscription features is increasing, such as Bold Subscriptions or ReCharge Subscriptions.
So are subscriptions compatible with free gifts? Is it possible to have both free gifts and subscription products in one order?
Unfortunately not. Gift Box is using draft orders to add free gifts to orders reliably. Draft orders are a native Shopify solution and despite that subscriptions are not supported for draft orders at the moment.
This has already been reported by other app developers in Shopify Community who are hoping that Shopify will integrate Subscription API to draft orders as well.
In case of further questions feel free to contact us at firstname.lastname@example.org, and we will be happy to help :)