HDFC Diners Club 10x points — a 500% boost
HDFC Diners Club Black offered 10x points on Flipkart, IRCTC, and other merchants, worth roughly a third of spend back, from September 14, 2015, through March 31, 2016. This promotion has since ended.
HDFC Diners Club Black cardholders earned 10x points, 50 points per ₹150, at Flipkart, IRCTC, Cleartrip, and Yatra from September 14, 2015, through March 31, 2016. This promotion offered roughly a third of spend back in redeemable value, making it one of the best earn rates available on any Indian credit card at the time. The earn rate was previously 5 points/₹150, so the 10x points promotion was a significant increase.