You must visit this site and see how I am getting money paid through this app, Visit - https://techalgorithm.com/champcash-earn-money-free-app-apk-2-2-30-version-2017-download-and-install-champcash-app/ as here you will find screenshots and detail procedure to download app and how to refer friends to earn money. There I have found if we try to install 8-10 app we can get our own ID which we can refer to our friends.