Google bans Android apps that show ads on your lockscreen, there's a catch however

In a rather user-friendly move today, Google has changed its Play Store policies and no longer allows apps that place obtrusive ads on your handset's lock screen. The new change affects all apps whose purpose is any other from being lockscreens themselves and is detailed in the the developers' monetization support page. It reads as follows:

"Unless the exclusive purpose of the app is that of a lockscreen, apps may not introduce ads or features that monetize the locked display of a device."

This means that if an app is designed to be a lockscreen ...