Jelena McWilliams said the agency will ask banks what's working and what's not; the acquisition of Hyperwallet Systems lets PayPal offer more services.
With a foray into financial services, Amazon.com could disrupt the decades-old card payments system, a move that some say could save the retailer $250 million a year in swipe fees.
Facing pressure to act on gun control laws, the bank said it would not "renew its contract with the National Rifle Association to issue the NRA Visa card."
Merchants have been challenging surcharge bans in numerous states on free-speech grounds. They have the wind at their backs following another court victory on Wednesday.
