Originally Posted by
JeredF
I recently booked TATL travel that showed no PZ inventory, and when I applied PlusPoints also indicated this would be a waitlisted segment,
Bold face is mine. Evey response missed this point.
When one applies for PP upgrade, United indicates that upgrade is either available or waitlisted. There is no ambiguity in this.
I guess that OP received an email about the clearance of the upgrade almost right after he/she finished the request. Because of this fact, OP suggested whether or not there was a hidden PZ space somewhere. My answer is no. PZ space was released at the moment when OP made the PP upgrade request.