LOL! I just got the 13 joke. And I have to agree with Kowen, especially the point where, "someone unable to find a ps4 in say the US or UK may buy a One instead?" I also thought this wasn't about total sales?
https://www.trueachievements.com/gamercards/SliferCynDelta.png%5B/IMG%5D">https://www.trueachievements.com/gamer/SliferCynDelta"><img src="https://www.trueachievements.com/gamercards/SliferCynDelta.png