NEW: Get 40,000 points and Gold status with the Marriott Bonvoy American Express Card Links on Head for Points may pay us an affiliate commission. A list of partners is here. This article is sponsored by Marriott Bonvoy For the first time since it was launched 18 months ago, you can get an increased sign-up bonus on the Marriott Bonvoy American Express Credit Card®. From today until 31st August 2021, the sign-up bonus is doubled from 20,000 Marriott Bonvoy points to 40,000 points. This is worth roughly £200 of free Marriott stays, based on our 0.5p per point valuation, or 13,333 Avios based on the 3:1 conversion rate.