Originally Posted by ohmark

I understand what you're saying but;
1. In your scenario, what's wrong with openness? Why doesn't the hypothetical fd clerk tell the g/p that there is an upgrade that's already been allocated to a PP, who is not scheduled to arrive till later unless the room is sold prior to his/her arrival? I think most of us, upon given a reasonable explanation, are accepting. But upon being given no explanation or a false one, are dubious and, maybe, disgruntled.
2. I also note that there is no stated benefit that would give PP's any priority over P's for an upgrade. The benefits of PP have long been few and are now fewer.