Collusion definitely exists. And not only do I say that, I actually witnessed it. There is this gaming room where people pay to play, aside from PC games, people can play Poker as well. Once I was there some time ago, 3 players were playing at the same table on 3 computers that were next to each other.
However, I honestly think that any thinking player can realize that such a thing is happening at their table.
Using charts and graphs or 3rd party poker software isn't really cheating, everyone can use them, especially with the use of internet.
However, I would like to ask if anyone heard about poker bots? There was this podcast with Daniel Cates - Jungleman, where he said that he sees bots playing, mostly SnGs and are making some mathematically great decisions, that humans shouldn't make and are probably never making. I then googled about them a bit, and actually found out you can buy them easily at prices of several hundreds $, but I still don't know how they work exactly...
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