This is a question that came up on one of my last flights Amex Travel provides several unique earning opportunities, a few of them: 5x earning with Amex Business Platinum, 35-50% refund on redeemed points, and the ability to...
Negative Update: Check to see if your Amex Business Platinum 50% Airline Bonus is extended

Check to see if you'll earn 35% or 50% of your points back with Amex Business Platinum