Well, let's ask ourselves a few questions. 1. Does every machine or table have the ability to win? Yes and no. As far as machines go, they are calibrated randomly, usually depending on what time of the year it is. For events such as the holidays and those crazy "year" promotions, i.e. 11/11/11, machines are calibrated to give more pays. 2. The casinos make millions off of gamblers. Why do people keep going back? That answer is easy. It's because the line between winning and losing is blurred. People have a difficult time knowing when to stop giving their money back. The casino has to pay out big sometimes. Not only because it's ethical, but also because they have to draw people back to them. Say I went to the casino with $100 and sat down and played a dollar slot machine. I have already dumped $75 into it without really getting anything, then all of a sudden, the machine starts playing music, bells are going off, and that pretty blue light on top is flashing. I just won $2500! Triple Blazing 7's baby! Do I keep playing, hoping to get more, or do I take my money and run and pay off that gawd awful credit card bill? Or maybe I'll come back next week and try my luck again. On the same machine. These are the things that actually go through people's minds. So, does the house have the advantage? Yes. Yes they do. Because more times than not, people do not know when to quit when they are ahead.