Two obvious answers: 1) Use developer tools as onramps to Azure. Same reason Amazon made Lumberyard free. Yes, developers can opt for other clouds, but the eff

Two obvious answers: 1) Use developer tools as onramps to Azure. Same reason Amazon made Lumberyard free. Yes, developers can opt for other clouds, but the effort required to do so will often seem more costly than it's worth. 2) Specifically for Xamarin, if you've already built your iOS and Android app in .NET, in Visual Studio, and there's little more than a recompile between you and a Windows Mobile version, why not do that too?