I hope you're aware that this newest DEQM promotion applies only to the base miles and not miles from class-of-service bonuses.
Originally Posted by DEQM T&C
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.
This offer does not apply to class-of-service redeemable bonus miles, elite bonus miles, redeemable bonus miles or promotional EQM.
So, in your case, you should get 250% of the base miles as EQMs, but not 300% since you don't double the class of service bonus EQMs.