I havent signed up yet but was going to this week before my Boston flight. Should I wait? Will they count my past flights if I wait?
I don't think they would count your past flight if you waited past today. I haven't heard of backdating except to the most recently begun start date. In other words today they would backdate to May 16, but as of tomorrow (a new start date) they would only backdate to June 1. I may be wrong, this is completely anecdotal (like much of the info on the challenge program).