You've always been able to do this. You could distribute your Xamarin.iOS application as source-only and require users compile it themselves without being in vi

You've always been able to do this. You could distribute your Xamarin.iOS application as source-only and require users compile it themselves without being in violation of the license, but you still cannot release it on the App Store without a commercial license (since it is impossible without jailbreaking to replace the .so).