Most of these sales must be bargain bin. The game hardly even charted that much in Europe that I remember?
What was it's highest NPD? Not more than 200k I think. Then I think it dropped out of NPD forever after one month IIRC.
Hard to see where 4+m is coming from. Must be shipped figures and about 1 million are sitting on store shelves?
GT series is definitely losing a lot of steam, with the PSP version bombing as well.
But yeah these are definitely shipments not sales if theyre from the manufactorers website.