Utilize the input text as a context reference, choose the right relationship between AmEx and American Express from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

As the war to own the digital wallet continues, American Express is joining the battle with Express Checkout, a new way to pay using your AmEx card online.

Answer: operator