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Title: its linked to your profile on xbox live, zune, and games for windows live (have to be on same account). 80 points = $1
Review: You use it to buy stuff on xbox live, zune, and games for windows live, It's literally a gift certificate, so you're basically buying a less useful version of cash, way to go and yes, I realize I am approaching the record for the single longest sentence ever (oh, and it's the only way to buy things on the xbox live marketplace for some ungodly reason, apparently they don't believe in convenient forms of goods transactions).
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