MAJOR We have introduced a new field called auto_add_free_gift into the Free Gift Promotion type where free gifts are automatically added to the shopping cart for all the eligible products. For more information, see Promotions Overview section. This feature is still a work in progress.
Additionally, in Commerce Manager, we have also introduced the Automatically add free gift items to the cart toggle to add free gifts automatically to the shopping cart. For more information, see Creating Free Gift Promotions.