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If you already have individual Gold memberships, the price is discounted based on how much time is remaining on your existing Gold memberships. For more information, please see Join an Xbox LIVE Gold Family Pack .
The Xbox LIVE Gold Family Pack will includes four Xbox LIVE Gold accounts. So by purchasing an Xbox LIVE Gold Family Pack, you get four memberships for less than the price of two individual Xbox LIVE Gold memberships.
I would like know how that which I copied from their website even remotely suggests that this page is for existing users. Microsoft is putting out false advertisements.
I am going to see about taking my complaint for legal advice because I was under the impression false advertising is illegal.