http://forums.xamarin.com/discussion/22129/welcome-to-cocossharp-forum
http://www.infoq.com/news/2014/08/cocossharp
Xamarin has forked Cocos2D-XNA, a 2D/3D game development framework, creating a cross-platform library that can be included in PCL projects.
Xamarin has decided to stop contributing to Cocos2D-XNA, forking instead the framework and creating a new library called CocosSharp which is open sourced on GitHub under a MIT license. For the beginning, Xamarin has refactored the source code in order to create “an idiomatic version of Cocos2D for the .NET environment.”
Автор оригинала:
The purpose of the MIT license is to unencumber your fair use. Not to encourage you to take software, rebrand it as your own, and then «take it in a new direction» as you say.
While not illegal, it is unethical. I am sure Microsoft, one of Xamarin's key partners, is quite happy to know that Miguel is actively engaged in this type of unethical behavior.
Если уже было — не серчайте.