I had a small discussion about this last night; gaming channels in general. Normally, whatever is at the top of the totem pole people will try to emulate, and make their own. Gaming is a really big thing, and a lot of people think that if people like Pewdiepie can make tons of money by just screaming like a madman while playing a game; why can't they? This is where you get hundreds of thousands of people making gaming channels solely for the purpose of getting money, and applying no effort into their content, or channel.
I'm not saying that this is everyone, I'm saying it's the majority. You can tell if someone has put effort, and even enjoy what they do by how they do it. The time involved in editing, bettering their equipment because they care about their contents quality. I mean heck, my gaming channel is set to launch on Monday, and I have just a crappy headset mic, though I'm just starting out, so it's expected, haha. Some do "just play", though some vloggers don't put any effort into their videos, and "just talk", etc. It can be said with any genre of video, just depends on who it is.
