FabFitFun Upgrade Deal – $10 in Add On Credit! Posted by Brandy on October 24, 2016. Subscription Box Coupons & Deals / FabFitFun VIP Box Coupons Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification Through Tuesday upgrade your FabFitFun subscription to an annual and get a $10 upgrade credit! PLUS, you’ll get early add-on access on October 31! FabFitFun Editor’s Box is now available – New members can save $10 with code Fab10.