It was earth-shattering in the payments world when Costco ditched American Express as their co-brand card issuer and signed on with Citibank. Citi offered them an amazing deal that gives Costco nearly free credit card acceptance.
It turns out that we know more than this, even though Citi won’t start issuing the card until April 2016. That’s because the Citibank Costco credit card deal was filed with the SEC and is publicly available online.