Wow you actually clicked that link? Well here you go:
Christmas 2019 Free Shipping Terms and conditions:
Offer valid through Monday (12/23) at 12p MST. Order must be placed by 12/23 at 12p MST to ensure delivery by Christmas. Total order value must exceed $150. Offer valid on any non-Subscription product. Offer valid only when shipping value is less than $40. Cannot be combined with other offers.