Fees can be extracted in many ways: While Android is open source, the Google applications, like the Play Store, Gmail, Google Maps, Google Play Services,

Fees can be extracted in many ways: While Android is open source, the Google applications, like the Play Store, Gmail, Google Maps, Google Play Services, and others must be licensed. This licensing agreement is called the "Mobile Application Distribution Agreement" (MADA) and comes with tons of restrictions.[1] This is only one example and the monetary considerations are unknown. 1 - http://arstechnica.com/gadgets/2014/02/new-android-oem-licensing-terms-leak-open-comes-with-restrictions/ http://arstechnica.com/gadgets/2014/02/new-android-oem-licen...