I just bought my tickets but my reward status hasn't changed.

Your reward status changes after the movie you’re seeing has ended. You’ll get an e-mail/notification with a reward status update after the movie is over (this can take up to 4 hours).

The Atom Rewards introductory offer of “See 4 movies, earn a free standard ticket” ends on December 31, 2018. Only members who saw their first qualifying movie on or before December 31, 2018 are eligible to earn a free movie ticket under the Atom Rewards offer.