American Express is currently running huge sign-up bonuses on Preferred Rewards Gold, The Platinum Card, Business Gold and Business Platinum, worth between 40,000 and 120,000 Membership Rewards points. Apply now, however, and you will receive a sign-up bonus of 80,000 Membership Rewards points, which converts to 80,000 Avios. Having a British Airways American Express card does NOT disqualify you from the 80,000 points bonus. Here are the American Express Platinum core benefits (for me)Here are the key card benefits to me. For clarity, you will definitely receive the sign-up bonus on The Platinum Card if you already have a British Airways, Nectar, Marriott Bonvoy or Platinum Cashback American Express card.