Delay at ORD prompted me to just buy 1 year membership, I just went to the counter and mentioned there was an on-line discount for $100 and they had no issue offering that discount on the spot.
Originally I planned on getting a day pass and then buying with online code getting refund ($50) day pass fee, was told by AAgent at the AC the system would allow only one of the two discounts (either $100 off or refund of day pass fee $50) if I purchased later.
Anyone had success getting a day pass credit $50 at the same time using the online discount? Not sure it would work since the code is for online purchases. Assuming you purchase (1 year membership) within 30 days of buying day pass.