Lillypost Cyber Monday Coupon: 20% Off 3+ Month Subscriptions! Posted by Hello Subscription on November 26, 2017. Cyber Monday 2017 Subscription Box Deals / Cyber Monday Subscription Box Coupons & Deals / Holiday Subscription Box Deals & Doorbusters / Subscription Box Coupons & Deals / Lillypost Coupons / Books Cyber Monday 2020 Coupons / Kids & Baby Cyber Monday 2020 Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for LaterGo to commentsNotification Lillypost is a monthly kids picture or board book subscription box and they have a Cyber Monday Sale! Use code BLACKFRIDAY17 at checkout to get 20% off a 3, 6, or 12 month subscription! Expires Monday at 7pm EST. Check out all of the Cyber Monday Subscription Box Deals!