Jamba Juice: $1 OFF ANY Smoothie w/ Jamba Insider Rewards (exp. 3/7) March 7, 2014 By: Tricie share Check your Emails. Jamba Juice sent a coupon for $1 OFF ANY Smoothie to Jamba Insider Rewards Members! Today 3/7 is the last day to use! If you are not a member Sign Up Here for future offers. Please be advised that this post may contain affiliate links. See my Disclosure Policy for details.