I've been seeing this happen a lot with just about every single channel I like to watch having their own respective video about being demonetized, and I've come to the following conclusion:
There is no huge conspiracy other than Google/ YouTube likes money, and giving people incentive to post videos on their servers which don't return a profit is bad business practice. So they ally with bigger corporations with actual budgets and give them free passes whilst Johnny FaceCam gets the shaft.
But YouTube has the issue of the "You" in their name. For a decade plus, YT prided themselves on being a hub for creator content, but quickly realized for every one PewDiePie and Smosh they could exploit, they have to be saddled with ten-thousand squeaky Minecraft LP's that do nothing but waste time and bandwidth. So, systematically for years, YT's corporate has been playing Minesweeper with their own base, trying to weed out the problems without just out and out saying "You little fuckers aren't making us money. Fuck you, get off our server."
Youtube doesn't care about it's userbase. It doesn't care what you have to say so long as it doesn't get them in hot water. It just wants your money and it realized the quickest way to do that is just ape cable TV and promote shit like "Late Night with Funny Man" and "Sportsball" and "Interviews With Popular Peoples."