"Kabam is now concentrating development on AAA quality games for Apple and Android mobile devices and has decided not pursue development for Windows Phones. Kabam is concentrating its resources on the biggest market opportunity, which is Apple and Android devices worldwide."
It makes sense to devote resources towards the mobile platforms with the largest market share -- Android and iOS power 96.3 percent of the worldwide smartphones sold last year, according to IDC -- but Kabam isn't lacking for resources.
Regardless of the answer to that question, it seems like Kabam won't be fulfilling the July 2014 agreement to bring multiple games to Windows Phone after all. The company released a single title, Fast and Furious 6, back in November and there's no indication that any of its other games will follow.
One game developer alone doesn't make or break a platform, of course. Still, it's concerning that a reasonably large one isn't going to support Microsoft's efforts. Unfortunately, the mobile market is one of momentum and self-fulfilling prophesies: If app makers don't think a platform has enough potential to grow, they're less likely to devote resources to it. And in turn, that reduces app choices for the platform, making it more challenging for it to grow in the first place.