http://www.develop-online.net/news/38108/Xbox-begins-dev-support-for-free-to-play
Microsoft is fostering new relationships with developers in a bid to bring free-to-play gaming to Xbox, Develop understands.
Several sources connected to the matter say Microsoft is, behind the scenes, calling on developers to discuss possible free-to-play game deals. This will be games that can either be monetised by in-game items or premium upgrade costs.
The Xbox manufacturer did not comment on the matter when approached by Develop.
Microsoft’s 360 operating system will incorporate a microtransactions service, Develop has heard, where in-game items will be exchanged for Microsoft Points on the fly.