Oh, I thought this was known. I'm not even joking... A few years ago, I was at a local comic shop, and I watched someone (a kid) play the machine and appear to get a "perfect" shot, key went exactly into the fucking hole... but then it just pulled back. No prize! I was stunned when the kid asked an employee essentially "WTF?" and the employee replied "there's a chance the key may not turn even though it's lined up."…
So it sounds like skill + luck: key in the hole gives random chance of winning. Honestly, these kind of lawsuits are ridiculous. People need to sue General Mills for false advertising instead because sugary cereals causing diabetes; or any other big-food company brainwashing children on YouTube kids.
Yeah, same can be said about "brainwashing kids on YouTube" (whatever that's supposed to mean anyway) or "false advertising" of cereals ... what is your point?