The deal works like this: Pay $99 up front and go home with a 4GB Xbox 360 and a Kinect sensor. For 24 months you'll be locked into an Xbox Live Gold service contract, where you'll pay $14.99 a month.
I know it sounds like one of those gross rental center scam plans, but you're only paying about $30 more total compared to buying an Xbox 360 outright. What's next, straight up cell phone plan pricing structure? I think many would go for a free console for a 2-year contract lock.