Wait. your son already know's he's getting it for xmas? wtf is the point of that?
My sons are ultra-mellow about X-Mas, it's almost a chore to get them to think of things they want as gifts. I was the same way as a kid (still am) and at 13 I told my parents that they didn't have to get me anything anymore. The only reason they are getting it for X-Mas and don't have it already is because of my wife, she made a big deal about having a big gift to give them. I don't really know if this satisfies your "WTF" but basically it's just how we roll, besides they are getting several gifts that they don't know about.
I LOVE paying for Xbox Live! I also love that my love for it pisses off so many people.