Red box has posted on their Facebook:
Join the redbox text club before the next free 1-night promo code goes out on Thursday! All you have to do is text REDBOX to 727272 — easy, huh? (The lawyers would like to add: Only available on participating carriers, message and data rates may apply, and you can always text STOP to quit.)
So if you would like to enjoy a code monthly for a FREE movie (value $1) sign up. 🙂