Through its Membership Rewards program, American Express extends air miles to corporate cardmembers. The British Airways MasterCard Corporate card will be marketed to 1,000 companies. First USA Paymentech will provide software to analyze spending trends, to aid in negotiating volume discounts with suppliers, and will monitor credit limits to regulate spending. "We have a really strong demand for this card from large banks that have tried and failed in the commercial card business," said James W. Baumgartner, president of Paymentech's commercial card unit. The air rewards program, British Airways Executive Club, is available for an additional fee of $50. Cardholders are eligible to earn varying levels of points on purchases, including car rentals and hotel stays.