-// Google's documentation says the following line is required for `firebase-ads` but things work correctly without it. I have no interest in including Google Mobile Services if I don't have to.
+// Google's documentation says the following line is required for `firebase-ads` but things work correctly without it. I have no interest in applying the Google Mobile Services plugin in the standard flavor if I don't have to.
+// I suspect that in the free flavor `firebase-ads` applies it even when not specified. https://firebase.google.com/docs/admob/android/quick-start