very interesting. Did not expect IndusInd lead in spending per card. Indusind has large number of credit card variant, but leading in the spending per card is interesting..
I think the below factors contribute in Indusind's case:
Since IndusInd allows only 1 credit card per person mostly, the spends is not divided across multiple credit cards in one account. For example, in Axis, if a person has 3 cards and then all their spends with the account will give a reduced number (Spends/3) even if they dont use 2 of them especially if LTF.
Indusind is also not very attractive in terms of rewards, so not many people like to pursue them for more than 1 card. People in this community are the exception who go after them for more than 1 card.
Indusind also takes a hefty fees for high end cards and then give value back to customers in form of vouchers. This fees also pushes the numbers up.