Because they'll add it to the list of coercively and deceptively worded questions they force you to answer before you can use a WIndows account, phrase it so as to sound useful and harmless, and have a big friendly "Sounds great!" button and a tiny "No thanks, I prefer my life to be shit" link.
Because they'll add it to the list of coercively and deceptively worded questions they force you to answer before you can use a WIndows account, phrase it so as to sound useful and harmless, and have a big friendly "Sounds great!" button and a tiny "No thanks, I prefer my life to be shit" link.