I saw that bit, and
# Double Elite Qualifying Miles for this offer is defined as two times the actual base flight miles credited to the account for qualifying flights taken during the offer period.
does seem to point at 250% total, but
# This offer does not apply to class-of-service redeemable bonus miles, elite bonus miles, redeemable bonus miles or promotional EQMs.
seems to only be talking about CoS RDM bonuses, Elite bonuses (RDM). It does not explicity cover CoS EQM bonuses - unless this is 'promotional EQMs'?