I'm having some problems getting ads to work. I can't rap my brain around why it isn't working. I have the following plugins installed:

com.google.playservices 19.0.0 "Google Play Services for Android"
com.rjfun.cordova.plugin.admob 2.1.7 "AdMob"
I've have used this tutorial: <https://www.thepolyglotdeveloper.com/2014/06/using-admob-ionicframework/>

This is my code in the apps.js:

```js
 .run(function ($ionicPlatform) {
    $ionicPlatform.ready(function () {
        // Hide the accessory bar by default (remove this to show the accessory bar above the keyboard
        // for form inputs)
        if (window.cordova && window.cordova.plugins.Keyboard) {
            cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
        }
        if (window.StatusBar) {
            StatusBar.styleDefault();
        }

        // select the right Ad Id according to platform
        if (window.plugins && window.plugins.AdMob) {
            var admob_key = "ca-app-pub-xxxxxxxxxxxxxxxx/xxxxxxxxxx";
            var admob = window.plugins.AdMob;
            admob.createBannerView(
                {
                    'publisherId': admob_key,
                    'adSize': admob.AD_SIZE.BANNER,
                    'bannerAtTop': false
                },
                function () {
                    admob.requestAd(
                        {'isTesting': false},
                        function () {
                            admob.showAd(true);
                        },
                        function () {
                            console.log('failed to request ad');
                        }
                    );
                },
                function () {
                    console.log('failed to create banner view');
                }
            );
        }
    });
});
```

This results in a black banner area at the bottom of the app, however no ad is ever loaded. This code is currently live, on the admob site I can see a couple hundred session. However my impressions and Request rpm are both at zero for a couple of days now. Anybody have any idea what might be wrong?