How exactly did you know it was fake though? Because it was hard to remove?
And if it is real MAC, like someone said, it can be like that chair story. And I know Target got sued, or was getting sued, by Bare Minerals because they weren't authorized to sell their products. They got it from a third party.
I work at a CCO, and my manager said Estee Lauder likes to pretend that CCO's don't exist, which would explain why in the e-mail, they don't mention CCO's. Because if "everyone" knew about CCO's, no one would buy the stuff at MAC.