Source
Paytm is making QR code scan a habit in India! – Paytm Blog
Though I guess QR code of competing services would not work very well 😀
To make the QR code scanning a habit in our country, we have now integrated the capability to scan any non-Paytm QR codes generated using open standards. This will come in handy any time you want to scan a regular QR code without having to install yet another stand alone QR-related app.