Winning an NBA championship usually means the hard part is over. For Mark Cuban, the celebration hit an unexpected timeout when American Express (AXP) refused to believe he was really trying to buy a six-figure bottle of champagne.
Billionaire entrepreneur, former Dallas Mavericks owner, and former “Shark Tank” investor Mark Cuban shared the story during a 2023 appearance on the “Knuckleheads” podcast with former NBA players Quentin Richardson and Darius Miles, recalling how his brand-new American Express Centurion Card — better known as the Black Card — was declined after the Mavericks won their first NBA championship in 2011.
