Nobody is lying. Let's get that straight. There are different methods being used for sampling. Unless Bandai Namco track every purchase.
So there's no deliberate deception going on from any source.
However, it would be nice to know all the assumptions and sampling methods being used by all of them. Then it would be possible to make an informed decision. Presumably, Dr Ian Bell who has a Ph.D in psychology has access to the methods the publisher used. He has statistical knowledge from his studies that far outstrips all forum members combined. What is required is some hard data and hopefully a bigger sample size of global retailers than 150.
Pure naysaying without cold hard data doesn't progress any analysis.