Redbox has sent out a survey to see what media you are using with Redbox. But you don't have to wait for the survey. Just text R1 or R2 to Redbox (727272) for a $1.50 off code good till 11:59 PM on 8/26.
For those who stream, just type R3 for a half off code good to 9/2.
How do you watch movies? Reply R1 for Blu-ray, R2 for DVD, R3 for Streaming. Answer for a sweet reward!