Read original post by Dan Colasanti at The ImproviSoft Blog
In 2008 Microsoft started the Zune Pass affiliate program where developers could earn $3 to $6 for every new Zune Pass subscriber that they referred, but the program was cancelled a couple years ago when the Zune music player devices were discontinued (See: http://www.microsoftaffiliates.com/index.html?Content=Zune). Since then Windows Phone came along with both a built-in Zune and connectivity to the Windows Phone Marketplace for downloading apps and games. But no affiliate program has yet emerged.