A new benefit has been added to the Cardless Qatar cards. Cardholders that spend $15,000 in their first card year and $25,000 in subsequent years will get a full refund on reward fees for award flights booked with Qatar Airways.
This only applies to Qatar Airways operated Award Flights and not partner flights. Could potentially be a huge benefit to some people, but the $15k/$25k spend requirement will kill the deal for most.
Qatar already gives you headache trying to apply the 24 hour cancellation rule. I expect this benefit to be promoted on the card company side only and Qatar customer reps being completely oblivious to this.