DroidScript is a non-profit organization; when they signed up for Google AdMob and Google Play Store, they provided the same tax ID (their EIN) in both cases. Creating separate Google accounts with separate email addresses would not have been sufficient; Google knows that they're paying the same company.
(The ads in question were being run inside the same app that accepts Google subscription revenue. Google can and will follow that thread!)
Creating a subsidiary business for every type of Google account you have would be quite expensive, and, if Google realizes what you're doing, it will make you look like you have something to hide, making you more likely to get banned, not less.