Coinstar (owner of Redbox) is running a sweepstakes now through July 13 called “Vacation on a Dime”. You can enter on Coinstar’s Facebook page, and prizes include $90 gift cards from Coinstar as well as free Redbox rentals for a year.
I am guessing they are doing this to get the word out about their Facebook page, as it seems Coinstar is starting to look at social media as a viable advertising method. I wonder where they got that idea from? :)