Read the thread at CCG before jumping in. I can't confirm if this works 100% or not, but I've gotten my notices that the cashback was confirmed and should be ready in 7 -14 days. Refunds go right into Paypal.
$250 max refund per order, maximum 3 orders per account.
All I can say is this looks 100% legit. I just saved $115 on finally getting that copy of Doshin 2 64DD.
Most people are using it to buy PS3s/Xbox 360s but you can get super creative.
Dunno if this deal will last or not; if Microsoft knows what they're doing, it might be around for awhile. Pretty damn fantastic regardless.