Originally Posted by
The Situation
They do not qualify for the promo, BUT flights booked AND marketed by AF earn based on % of distance flown. For W and J class, those earnings can be very generous and may be even better than the promo. You will have to do some math.
OP specifically mentioned MQMs which are based on distance flown in both cases (and PE fares and discounted J have 50% bonus in both cases), but in the DL marketed/operated case will also earn 75% bonus MQMs due to promo.
BOS-CDG roundtrip MQM earn with AF in PE/discount J is 10344 MQMs vs. 18102 MQMs on DL marketed/operated with promo.
You are referring to MQD/RDM earn where the math gets more complicated when comparing with DL promo earn due to distance based earn on partners.