That was not a real sale.

It's a fake article pretending that there's a sale in order to make affiliate money selling grey market keys from msdn. Those keys activate, but they don't come with a valid license to use, those are supposed for testing only on that specific msdn account.

It works like this: the fake tech blog gets 40%, the rest goes to the keys seller, Microsoft gets 0%.

Fuck Microsoft, but at that point is more ethical to just use massgrave and activate it for free