The hyper-regionalization is an odd construction; makes you wonder just how much there is to save by printing a bunch of different (sub-)region versions compared to just bundling most on one “English” printing.
It was created before Amazon, right? And I'd imagine for many people, directly importing is not a daily purchasing habit. That way they can keep their "release windows" and other things to make them feel like they're getting every last drop off profit. Or maybe they think consumers want localized covers. It might even be true - someone must be demanding terrible dubbed products, so who knows.