Slashdot Mirror
Tickets for Tracking Players in Casinos?
aws910 asks: "I was in Las Vegas recently, and I noticed that most machines now give barcoded tickets as payment instead of coins. These tickets can then be used in other machines as a wager instead of paper money. A basic slot strategy is to move from one machine to another, and play machines in certain areas of the casino floor to improve your odds. With the ticket system, It seems all too easy for someone to build a system to track a player from one machine to another, giving the house the ability to kill the player's (already slim) edge. If a machine knows how much you've already won as soon as you sit down, do you think it will give you good odds? I couldn't find any articles on it. What does Slashdot think about this?"
Suppose a slot machine has a payout schedule such that, on average, the machine pays out 97% of the amount it takes in. Somebody will win the occasional big payout but most people will lose, and the losses will tend to more than cover the wins.Why should the casino care whether the payouts go to you rather than the next guy? All they care about is that the overall odds are in their favor, and they are. Somebody will win the jackpots, and it might as well be you as much as anybody else. You don't scare them.
When you say "A basic slot strategy is to move from one machine to another, and play machines in certain areas of the casino floor to improve your odds.", you are talking nonsense. Switching machines doesn't change your odds*, so the casinos don't need to do anything special to foil that strategy. You can't combine negative expectation bets to get a positive expectation bet.
(* actually, there's an exception to that rule, and I've made money exploiting it, but I gather you're not talking about wonging into machines with unusually high per-machine progressives. That's gotten pretty hard to do lately due to stiff competition and "anti-flea" features built into the newest machines by the manufacturers. But it was fun while it lasted, eh?)
I play Nerd-Folk!
I work in the Slot Technical department of the first casino in the world to have a 100% ticket-in/ticket-out floor. I can tell you with absolute certainty that your fears are completely unfounded.
There are many advantages to using tickets instead of coins. The primary reason is that it saves us a ton of money. A stack of 200 tickets sitting in the printer can last for days. If the same machine has coins, it might have to have its coin hopper filled multiple times a day. The labor savings from just that are incredible. It also prevents people from having to wait for an attendant to fill an empty hopper when they cash out. Happier customers stay longer, spend more money, and come back more often.
Coins have to be collected, counted, wrapped or bagged, and redistributed, and they are very heavy. My casino has two people to handle the paper distribution. It would take 40-50 additional people to do all coin handling.
Contrary to popular myth, we can't change what a machine does on the fly, nor do we need to. A slot machine has a theoretical mathematical hold percentage that is in our favor. It varies from day to day and week to week, but over the life of the machine it almost always comes very close to the theoretical. We don't need to cheat. We can give you back 99% of what you put in and still make money. Most of the time you'll take your 99% and put it in again. Then we'll take 1% of that. And you'll do it again. And again. That's how we make money.
We don't need to track you with barcoded tickets, we do that with player's club cards. We entice you to use cards by giving you comps based on how much you put into our machines. You don't have to use a card if you don't want to. The only reason the tickets have barcodes is so that the bill validator can read it. The unique number on the ticket is there so that the machine can query the back-end system to validate it as a good ticket. Nothing more.
Yoda of Borg am I! Assimilated shall you be! Futile resistance is, hmm?