If there’s any doubt whether people are willing to pay $900 for a premium credit card, just look at the latest quarterly results for American Express: The credit card issuer reported Friday that it beat third-quarter earnings estimates and raised its full-year outlook.

It’s been a month since American Express refreshed its Platinum line of credit cards, raising the annual fee by $200 to $895, and that change is already paying dividends. The company has seen “strong” demand for these cards and more than 500,000 people have requested the New York-based issuer’s new pocket mirror card.

“The initial customer demand and engagement exceeded our expectations, with new U.S. Platinum account acquisitions doubling compared to pre-refresh levels,” Stephen J. Squeri, chairman and chief executive off

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