Paid for MTC bus ticket using credit card

Last week, I boarded a white-board MTC bus and saw the conductor using a Pine Labs POS machine. Curious, I asked if card payments were accepted, and he confirmed. But when I took out my Axis Ace Visa credit card, he said these cards will not work. Since my card had Tap & Pay enabled and the conductor was polite, I asked him to give it a try. if it failed, I’d pay in cash. He selected the card option, I tapped, voila! ticket got printed. Even the conductor seemed surprised and asked me to check the payment mode on the ticket. It showed NCMC Later, I noticed in my bank statement that I was charged 9.22 for a 9rs ticket. I guess its payment gateway fee. Still, it’s great to see credit cards getting accepted in MTC buses. Hope they train conductors on pine labs payment options as still not many know how to use it properly. Did anyone used rupay credit/debit cards thru tap and pay in MTC ?