If you sign up to receive texts from Redbox you will get a code for a free one night rental on the first Monday of every month. It is a one time use code so you can’t use it one time for every card you have like some of their codes are.
I signed up a few months ago and have not received a lot of spam as a result, nor have I been inundated with redbox messages.
Sign up at www.redbox.com
Also, if you have a Blockbuster box near you, you can get a FREE 1 night rental by entering HELLOMONDAY. It is valid today only. You can find a Blockbuster box http://www.blockbusterexpress.com/
What are you watching tonight?