Originally posted here by nihil
Actually it isn't quite as bad as that:

A: The Microsoft genuine Windows offer is designed to help customers who unknowingly purchased counterfeit versions of Windows XP by offering those who qualify a complimentary copy or electronic license key for a genuine copy of Windows XP.

Obviously it is in MS's interests to put counterfeiters and cheating OEMs out of business, so if you have genuinely been fooled, they want to enlist your support to get the information to go after the counterfeiters/cheats.
Where'd you see this? I looked @ MS's site and didn't see any mention of it.