Recharging mobile to cost more on Paytm, PhonePe as they start levying platform fee

There was a time when payment apps like Paytm and PhonePe gave cashbacks to encourage users to pay their utility bills using their platforms. Now, these apps have started charging their customers a platform fee for recharging their mobile numbers, paying electricity bills etc.

What is the platform fee?
As per the PhonePe app, the platform fee is a nominal fee for using PhonePe for recharges/bill payments, regardless of the payment mode and it is inclusive of GST. However, if the mobile recharge fails then, the platform fee will be refunded to you along with the recharge amount paid (inclusive of GST).