All of those fall into the "gaming" segment. My office used to be at one of a state's backup lottery sites. I personally knew many of the coders on some of these gaming systems. They always had good stories and inside scoops. Different guys did most of the casino games. But they are involved in many non-casino games like keno. Afaik, the extra features are built into the lotteries. But if you're well connected, all of the electronic casino games can be rigged. Supposedly the casino cops watch for that. There is a ton of psychology involved in gaming today. They legally manipulate everything you see. Even wins and loses. They are even allowed to manipulate wins and losses, so long as they remain within the random statistical distributions certified on the machine in question. Which means scheduled wins and loses. Usually designed to maximize physiological effect and peak gaming hours. Which means, that time you thought you were close to winning wasn't so. They just wanted to make you think so. And that low pay out win was there to keep you losing longer. In this way, they keep people losing more. Which is, of of course, more profit for them with the same odds. So on and so on. Internally lotteries were called poverty tax.