Stolen or counterfeit. For people that don't know Yu-Gi-Oh $1M is a ludicrous number since Konami has and has had a very aggressive reprint policy. The value here entirely comes from the fact that it's an uncut sheet, I'd be surprised if anyone would pay that much for it.

On a side note in 2003 I opened a pack and one of the cards was just a piece of cardstock probably they just ran a few sheets through in off-impression mode and forgot about them