Please add to this list--
HDFC Infinia 16.5, 33% on Smartbuy
Axis Mag.Burg. for 24% on Traveledge, 14% over 1.5 lacs/mth
Axis Atlas for 10% on direct hotels, direct flights
Axis Olympus for 5.876% net profit on foreign spends
SBI cashback for 5% on most online spends
Axis Airtel for 25% on Airtel, 10% on Swiggy, Zomato, utilities
HSBC Live+ for 10% on dining, groceries, food delivery.
AU Lit with activation for 3.8--9% on groceries or apparel
Amex Platinum travel 7.5% for MCC exclusions (categories which are excluded by the above cards)