https://www.siliconvalley.com/2021/02/02/why-disneyland-killed-its-annual-pass-program/

The death of Disneyland’s annual pass program can be blamed on two opposing and unyielding forces: A loyal fan base estimated at 1 million passholders and a state-mandated 25% capacity limit on attendance when California theme parks reopen.

The prospect of a teeming horde of passholders looming outside Disneyland’s virtual gates represented a massive operational nightmare that threatened to overwhelm an advanced reservation online system planned for the Anaheim theme park.