Everyone who is rushing to cancel their Axis Ace for the 0.75% convenience fee increase are mostly relying on SBI Cashback + APay Voucher via Amazon route or Axis Airtel. The former is technically a loophole because SBI Cashback's T&Cs state that 5% CB is not applicable for GVs. So, if and when SBI or Amazon decides to close that loophole, and they certainly will, then will you cancel your SBI Cashback too? As for Axis Airtel, the cashback on non-Airtel utilities is capped at 10% OFF up to Rs 250 a month. So, one bill of Rs 2500 and you are done for the month. That way Axis Ace lets you go up to Rs 500 a month at 5% OFF. That's Rs 10k worth of utilities.
I had a friend get this because their biggest monthly expense was groceries and all kinds of stuff from DMart. At 1.5% CB, Axis Ace has been unbeatable there. Second biggest monthly expense are utilities and recharges all of which are non-Airtel. Unless using a CC is costing you more than paying in cash or via UPI, you shouldn't be cancelling the card.