All- I recently published an app on Google Play. I was wondering if it is possible to add ads in an update of my app, or if my app has to start with ads? (Much like you can't go from free to $0.99 for example). Thanks for your time.
This is azgolfers answer/comment but I just wanted to put in answer fromat to help other users know that my question has indeed been answered: "You can always add ads to your published apps. Ads network has nothing to do with Google Play store. Hopefully your published app is free, otherwise your users will complain if you put ads in your paid apps."