It's just my opinion.
The bank cannot exclude most MCC right?
Today they excluded Wallet and Rent, tomorrow they might exclude utility, thereafter they may exclude Jewellery, insurance and education payments
But this can't keep going on right?
They also have limitations, else people will shift to other bank.
Rent payment was a definite way, that was popularised to rotate, same was with Wallet load.
But bharatNXT is playing MCC game by using Utility MCC.
Just for bharatNXT, they cannot ban the entire MCC.
Only Snapay is there similar to BharatNXT, don't know what is it's MCC.
But I hope you got the overall point.