Free Redbox Rental

UPDATE: It looks like this code might not work after all. Sorry!
You can get a free rental at Redbox if you have a Discover Card. Just use the code KJXMT3 and your Discover Card at checkout. Find a Redbox here. To rent with a code, select “Rent with Promo Code,” enter the code, select your movie and use your Discover card to complete the check out process. You won't be charged as long as you return your movie by 9 p.m. the next night. Enjoy your free movie!
Thanks Mercedes!