It was not clear when I replied. If you are going to quote-reply my post, let's be accurate. Nowhere in your posts above mine did you mention "off peak Wednesdays" when you were complaining about a private company making their own business decisions. /End semantics
Your main question seemed to be, can a private company charge for use of their private parking lot. The answer is "yes, they can do whatever they want with respect to parking use and fees." I'm happy we figured that out.
Bigger picture, having grown up skiing at the Pass my whole life, I dislike the overcrowding and more draconian policies The Summit has established lately, but they are trying. I have a feeling when you want to tour on 1/4" of breakable freezing rain crust on 6:45am on Thursday and you park at the far Summit West lot, no one will ticket you.