It is merely a gimmick.
Eligible grocery and utility transactions are identified based on the Merchant Category Code (MCC) received with the transaction data.
30 reward points per ₹150 spent on grocery and utility transactions (1 reward point = ₹0.25).
Maximum spend capping: ₹2,000 per statement cycle (maximum 400 reward points per statement cycle).
Calculation: 400 reward points * ₹0.25 = ₹100.
The maximum cashback you can earn on grocery and utility transactions is ₹100 per month. Additionally, to redeem rewards, you have to pay ₹118.