X3TC threads clearly mention that certain plots could reward the player with rare blueprints, but only if the player already has PHQ. It seems that X3AP has similar plot rewards, but no clear reference on whether the same "have PHQ or lose profitsss" state exists.
So please, refresh our memory.
It must be noted that in each game the plots in question were added in later patch and thus the early players have had their PHQ's many times over by then.
PS. Kudos to the developers, who wrote:
Ingame message wrote:... breaking into the Company Vault using her brilliant mind and a sonic screwdriver ...