"Making"? Who's making you buy anything, seriously... They are offering new products, you don't have to buy them. Honestly they're not even really aimed at you.
The reasoning behind this is simple, they want to allow games that benefit from or require the camera. If you're not interested in those games, this is not a problem.
A game I'm developing with some friends:
www.xnagg.com/zombieasteroids/publish.htm
It is largely a technical exercise but feedback is appreciated.







