Introduction Indigo airlines is the largest airline in India and has last week launched their first co branded credit card in partnership with HDFC Bank and Mastercard. The card is called Ka-ching and comes in two variants viz 6E Rewards and 6E Rewards XL. This is an interesting development and lets look at the details below 6E Rewards I guess the only disappointment here is that this is not an Indigo frequent flyer program. That would really have been something and let’s hope it happens somewhere in the future. 6E Rewards is a reward program for spends made on the co-branded credit card. Each 6E Reward point is worth 1…