You would be wrong about that. Full-fare refundable economy (fare class "Y") carries a 1.5x multiplier on MQMs. The full chart of MQM earning by fare class is

You would be wrong about that. Full-fare refundable economy (fare class "Y") carries a 1.5x multiplier on MQMs. The full chart of MQM earning by fare class is available here: https://www.delta.com/content/www/en_US/skymiles/earn-miles/earn-miles-with-delta.html https://www.delta.com/content/www/en_US/skymiles/earn-miles/...