Because I am legitimately curious as to why one company does something the others don't, because my questions tend to lean towards the console maker I prefer, and because this is a site we are supposed to talk about games and game-related stuff on.
It ultimately shouldn't matter to you, because you have your fixation set on Nintendo and not the other two. Your post history and threads point out this factor.
Again, I do not know why you are bothered about the sales of the other to, in comparison to Nintendo.
Step right up come on in, feel the buzz in your veins, I'm like an chemical electrical right into your brain and I'm the one who killed the Radio, soon you'll all see
So pay up motherfuckers you belong to "V"