Credit card: What are air miles and how to monetise them to get free air tickets? An explainer

Banks may offer different variants of the same co-branded card based on the reward points they offer. For instance, one variant of HDFC Bank's co-branded card (6E Rewards XL - IndiGo HDFC Bank Credit Card) offers 5 per cent 6E Rewards on IndiGo bookings instead of 2.5 per cent in the basic variant.