Blockbuster Express: FREE Rental (Today Only)!September 6, 2010 by Mitchell Wischmann This post may contain a link to an affiliate. See my disclosure policy for more information. If you have a Blockbuster Express Kiosk nearby, use promo code MNDY to get a FREE rental! This code is valid today, 9/6 only. You can use this code once per credit/debit card.