In 2012 I contacted Williams (specifically WMS) about getting them to release Black Knight 2000 for use in a show I was working on. They said their "standard rate for use of a game as a prop is $2500 and will need to see script pages for the scenes the game will be used in". They had no interest in lowering the rate.. it was a very "corporate" dealing.
I was baffled. I thought they would jump to release it for the exposure. I went into it thinking it was a slam dunk. Unfortunately, it was docu-reality and didn't have the money to be paying $2500 for a pinball machine nor scripts to be sent in!
I can see how an entire room of machines could add up for the clearance.