From NerdWallet.com…..
‘Black credit card’ is the catch-all term usually used to describe the most exclusive credit cards available to the wealthiest individuals. They are given out by banks to high-earning, big-spending customers and offer impressive perks and very high or unlimited credit.
High street banks offer these cards to their wealthiest customers and the cards are usually supplied by major credit card firms such as Mastercard, Visa and American Express.
