Google may not think that Windows Phone has enough market share to spend resources building apps for the platform, but apparently the platform is big enough for Google to monetize it. Sure, Google already gets money for any ads you may see when browsing the web on WP, and it had an AdMob SDK so developers could place ads in apps; but, the AdMob hadn't been updated for Windows Phone 8 until now...Source: http://www.phonearena.com/news/Google-releases-beta-AdMob-SDK-updated-for-Windows-Phone-8_id48009
