This is Mathijs from AppBrain.
The app mentioned at the start of the article used Admob and Adcolony it seems: https://www.appbrain.com/app/emoji-switcher-root/com.stevens... and was taken down on October 2nd.
Another app implied in this scheme used 15 ad networks (including Admob, Facebook Audience Network and Twitter's Mopub) and was just taken down 6 days ago: https://www.appbrain.com/app/wheel-of-surprise-eggs/com.thom...