For whatever silly reason, you have to call Avis to make a change to your loyalty program earning preferences. I had been meaning to delete my earning preference entirely, so I could qualify for an Avis promo (meaning if you earn miles you can't get free days coupons from Avis), and this thread reminded me to do it. So, I just called in and asked for it to be removed. I had previously looked all over the Avis.com site to try to figure out how to do it for myself, but found nothing, so I just gave up and called in. It only took 90 seconds on the CC line, though it might take a few minutes if you are not CC I would guess.