Bonus miles for upgrades with miles
We recently used Skymiles to upgrade M class fares to business elite and first class seats on domestic US flights. After our flights, we received only base miles as if we had flown in economy. I thought that Delta awarded bonus miles for the class of service actually flown regardless of how you may have upgraded to it. Does anyone know the official policy on this? In the past when I've been bumped up to a higher class due to oversold flights, I have received bonus miles for being in first or business although I paid for economy. Thanks for your help!
Aussiemate