11.2019 Plugin works perfectly. Had some problems because C2 auto added <plugin name="cocoon-plugin-ads-android-admob" /> in the begining of plugins list of config.xml. You have to delete it and insert
<plugin name="cocoon-plugin-ads-android-admob" spec="1.0.12"/> instead, then it will work perfectly.
Tested on builds with phonegap and Cordova CLI.