Redbox continues its string of smart, rewarding marketing campaigns. Redbox has provided discounts and rewards for email and site activity - realizing that the value of certain acitvities (validated email address) far exceeds the cost of a free movie or two. Here's another: Redbox is running 10 days of discounts & rewards for users who active their mobile phones through SMS (Foursquare too). Again, Redbox intelligently views this as a way to acquire mobile users / activity. In that regard, it is a marketing promotion that will drive discounted short term activity but has longer term value thanks to deeper customer data / touch points.
Redbox is smart. And worth paying attention.