The strategy's changing, from the earlier machine-gun approach—bombard potential customers with advertising and discount offers and get as many of them as possible into the fold—to focusing on the number and volume of transactions per card , on ensuring quality customers who do not default, use a particular card over competing products and more often. "In 1992-93, when we set up our card division, the key challenge was visibility and product features as against value for money, setting up systems and getting processes to run. Today the biggest challenge is service: how does one make sure that 85,000 customer phone calls that we receive every month from customers are picked up on second ring and the queries addressed? That's imperative," says Irani. "The key to success today is to anticipate and respond to the changing financial and lifestyle needs of consumers through better services and benefits," says Sanjeeb Choudhuri, business manager, Citibank. American Express, with its declared aim of becoming the "world's most respected service brand", has just launched an aggressive media campaign selling its membership rewards programme.