because a lot of nintendo fans are left over from the wii dominance. also the mods are Nintendo friendly (not a bad thing, they dont let it stop them from banning nintendo fans but its a fact that most prefer nintendo) so i would imagine some nintendo fans are drawn here from that
Ltd predictions by the time 9th Gen comes out
Ps4:110million
Xbox one :75 million( was 65)
Wii u: 20 milliion