Gemini co-founder Cameron Winklevoss took to X (formerly Twitter) mocking American Express after the company revealed a steep annual fee increase for its Platinum cards. His post came in response to a report from First Squawk, which noted that AmEx had raised the annual fee on its Platinum card to $895, up$200. On Sept. 15, American Express launched the Amex Travel App and Amex Passport to personalize trip planning and digital travel memories. Amex Passport mints collectible “Stamps” on Base, an Ether ...