There is a free rental code for one DVD rental at Redbox locations today only- 9/22.
The code is advertised on their Instagram page so it should work for everyone. You might still want to reserve your movie online first just to be 100% certain the code works at the location you prefer.
The code will work for one DVD rental and make it totally free. You do need to return the movie the next day to avoid any late fees.
Head over to Redbox and use code SEPT22 at checkout.