Mantry Cyber Monday Deal: Free Extra Box Annual Subscription! Posted by Hello Subscription on November 27, 2017. Cyber Monday 2017 Subscription Box Deals / Cyber Monday Subscription Box Coupons & Deals / Holiday Subscription Box Deals & Doorbusters / Subscription Box Coupons & Deals / Mantry Coupons / Food & Snacks Cyber Monday 2018 Coupons / Men Cyber Monday 2018 Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification Cyber Monday Sale on Mantry! They are offering a FREE bonus crate when you sign up for a 12-month subscription (6 boxes) for Cyber Monday. Make sure you see it reflected on the screen (check lower right corner). Check out all of the Cyber Monday Subscription Box Deals!