Why did Costco get rid of American Express?

Why did Costco get rid of American Express?

In October 2015, Costco sent a note to its customers, explaining that the company wouldn’t be renewing its partnership with American Express, assuring them that with the new Citi and Visa cards, customers would have “the opportunity to earn generous rewards,” and that they would not have to apply for any new credit … Jun 19, 2016

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