I've learned down thread that what I knew was incorrect about the additional card holder. Thanks to all for the clarifications.
As I understand the benefit, only the primary card holder can enter with immediate family or two guests. The additional card holder (18+ years old) is allowed in only, no with two guests, with same day boarding pass for AA or partner airline.
Last edited by DaWhirledTraveller; Oct 8, 2021 at 9:03 am
Reason: Info was clarified down thread.