Why is CamScanner Banned? CamScanner Alternatives

Recently Google banned a very famous app CamScanner which had more than 100 Million downloads on Playstore. Getting CamScanner banned seems to be a good move but what is the exact reason?
If you are a student then Camscanner must be a very nostalgic application for you. If you were a student like me, CamScanner must have helped you to pass. But for those who don’t know about this application, here is a brief introduction for you.