The PA report did an article on XBox Live Advertising
Thankfully, a source who would like to remain anonymous leaked the ad sales data from October 2011 to June 2012. Microsoft sells ads on the Xbox 360 Dashboard at a CPM of between $19 to $23, depending on the ad placement and the type of ad. You’ll pay an extra 20% for animated or video ads, and if you’d like to select specific demographics for those ads, you’ll pay an extra 15% per “targeting criteria,” with the maximum bump being 30%.
They already do targeted advertising. Using the Kinect to better refine that is a no-brainer.
I contacted Microsoft and asked how much advertising revenue impacted the profitability of the Xbox 360. “We don’t share this information publicly but we can tell you that, since 2010, the advertising business has grown 142%”