https://www.desidime.com/discussions/is-add-on-credit-card-also-eligible-for-e-commerce-sale-discount?page=1#post_9052978
Yes, there are exceptions like HDFC
Is Add on credit card also eligible for Amazon and Flipkart sale discount?if already get discount benefit on primary card..
Yes, there are exceptions like HDFC
Yes, if add-on card number is different