In March, Robinhood announced its Platinum credit card, whose perks include generous travel rewards, $250 in annual DoorDash credits, and a free membership to Amazon One Medical. The name of the new card, which has a not-so-low annual fee of $695, is both an homage and a flex: It echoes the card brand made famous by American Express, though Robinhood points out its version is the only one to be “plated in 99.9% pure platinum.” The offering is the latest splashy option in the fast-expanding world of prem ...