It was a dollar per try, and I shoved in 5 bucks. By the 4th try it was NOTICEABLE that if you press the button at the "right time", there was a lag before it overshot it and you failed. I pretty much could guess that something like the article discusses was at work, and was simply more a game of luck.
Obviously I stopped after that, as a pure luck game is not as fun. If I had known that the default was 700 losses before payout as a default, I would have had a nice drink or 3 and counted the many people that tried it throughout the day
As a side note, saw one winner at the machine get a wrapped stack of 500, 1 dollar bills