In 2017 American Express reduced the 50% rebate on business class airfare or even economy airfare on your selected airline to 35% on the Business Platinum card and introduced a 500,000 points cap as well. That cap is now increasing to 1,000,000 points. In 2018 American Express did experiment with offering an increased cap when reaching spending requirements. This obviously won’t affect most cardholders.
Hat tip to DDG
Source: doctorofcredit.com