I called to switch my megabonus (yes i know the program already began). What I was enrolled in was a stretch for me so I requested a different promo. While they were not able to change it and have it reflect on my profile, they were able to enroll me into the "base" program that awards 2500 points after the 2nd stay. This is in addition to the original program. So at the end of the promo period ... If I don't achieve my original megabonus promo, MR will revert to the base program to see whether I achieve points following that promo. Only caveat is you cant get points on both, which obviously makes sense.