It’s already happened, Some years ago, perhaps 4 or 5, I was about to purchase an antique firetruck, which I was expecting to use as a tailgate vehicle. Before I closed the deal, I called the U to see how long the waiting list was for spots in the primary tailgate lot - I had asked years earlier and there was a long wait.
To my surprise, I was told there were spots immediately available. When I asked the price, I understood - a one time $35,000 donation for the opportunity to purchase the spot and then several hundred per year. All the long timers are grandfathered in, but new purchases, have to pony up corporate style donations to get in.
I let the truck go, and gave up my dream of ever having a spot in the lot.