Thank you for that long answer, but what I am really asking for is if someone have released on all these platform and what their "stats" are. Like if their income was 70% iOS, 20 Android and 10% Windows phone for example or if Windows phone maybe just had 0.05% of their income from the game.
It can vary greatly between games and sales isn't everything, the exposure you get on a less crowded platform can greatly boost your sales on the bigger platforms.
Developers buy tens of thousands of copies of their own games and pay people to write reviews and use other shady tactics to push them up on the lists, EA and other big publishers are releasing high profile games using established brands for iOS and Android, You need to advertise your game very agressively in order to stand a chance on those platforms or get lucky with some viral youtube videos.
On WP things are alot easier. Less competition makes it easier for people to actually find your game and if the WP users like your game you can be fairly certain that the iOS and Android users will find out about it (Even WP users have friends).
This is pretty much the same situation as on the desktop, if you are a small unknown indie developer you want to hit as many platforms as you can in order to maximize your chances of getting noticed, the smaller the target platform the easier it is to stand out.