Where did you find that screen?!
Have you bought Halo Reach? Is it a special promotion for those that have bought the game?
what happens if i buy this whilst having over six months left on my current subscription to live, will i get the 12 months after my current subscription expires?
what happens if i buy this whilst having over six months left on my current subscription to live, will i get the 12 months after my current subscription expires?
This is a trick, you are now in their auto billing system !
You can turn auto renewal off on Xbox.com. So people saying you are "tied" in are wrong. Just go to your account settings on xbox.com and set it to off after it has renewed.