YOU ARE DREAMING !
1/ they want to expend social network and casual = no only gaming
causla mostly dobnt care about online gaming in general (see Wii)
2/ gold is given them a LOT of money : it is a cashcow
it is the basic offer on 360 for hardcore gamers
no 360 fans want the live to be free : they dont care about paying compared to what they get ...
Time to Work !