Just saw this online as I was browsing and thought it was too good to be true until I joined and it was indeed only $1, knew I had to share it here! Grab it before it runs out!!
The offer seems to only show up when you log into your Microsoft account then go to the page. And it says it will charge you $1 for the first month, then $10.95 each month after unless you cancel.
And I am guessing you can't already have an Xbox Live subscription for it to show up.