Originally Posted by
pandaperth
Indeed. If you need EQM, then booking non-AA-operated flights as an AA codeshare in D will earn 2 EQM per mile rather than 1.5 EQM per mile, but be prepared to earn essentially no EQD or RDM. Sometimes such flights earn EQD and RDM based on flight length (the "distance" method) but this cannot be relied on. See the linked thread for more details.