Here is a short story of mine as a DP for 50% back using Amex Platinum Business card. Long story short, I ended up getting a 1-way business class flight from Cairo to Chicago for ~35K MR points, plus mileage credit for the "paid" flight which is a great deal. After seeing an incredible cheap CAI-AMM-ORD one-way business class fare with Royal Jordanian for ~$730, I decided to apply for this card since I had over 230k Amex points. The card arrived withing 3 days after approval and I called customer service to make sure that 1-way business class flights booked on the Amex Travel website would qualify for the 50% back. Surprisingly, most Amex rep insisted that the promo would only be valid on the airline of your choice (AA, UA etc.), but not on other airlines like Royal Jordanian. After speaking with a supervisor, I got confirmation that indeed 1-way thickets on third party airlines would be eligible as long as it was booked on the amex travel website. Very important : I had to call in to have my 50% points reinstated as the process was NOT automatic! Hopefully this is helpful to some especially now that Qatar has these phenomenal business class fares to SE Asia.