I haven't seen the date yet, but the last Disney Movie Rewards newsletter included this:
***During Double Points Days, members may enter an unlimited number of valid codes to earn points, but only the first three (3) codes will be eligible to be doubled. Codes can only be used one (1) time. For Disney releases, limit one (1) code per title regardless of media (DVD, Blu-ray, CD, etc.) or method of redemption per Account. Enrollee cannot enter more than 10 invalid codes within a twenty-four (24) hour period. Terms and Conditions apply. Subject to change without notice.
I'm not impressed.... Three codes certainly isn't very many when they are having all kinds of new releases and the holidays are coming up. If they want to restrict it some (maybe 10 codes) so a new person doesn't join and enter all 40 of their movies, fine, but three isn't enough. Since the last double points thing, they released Up, Monster's Inc (blu ray), and Santa Buddies. If you bought all those, you won't get double points for anything else you may have bought (I bought 4 others in addition to those 3).