Google decided band Mining and some sexual activities app. Recently google decided all mining and some sexual app delete your play store. This app type app can't store your play store. Google remove all app because google said that it will immediately remove the apps that "sexualizes minors," or are created to appeal children but have adult content. The app that contains images of child sexual abuse will be directly reported to the officials and the accounts of the developers and distributors will be deleted by Google.
[source][https://www.google.com/webhp?hl=en&sa=X&ved=0ahUKEwiDpeXxwr_cAhXEwI8KHfXVC-UQPAgD]