The fighting game scene seems to contradict the article. You have entire websites such as Shoryuken that are dedicated to them, and fans of the genre (myself included) will buy a fighting game on a whim, just to see how it stacks up to other fighters. You have people who still actively play in the scene, playing games that are 10+ years old competitively, while still picking up and learning new games. Killer Instinct, Tekken 7, Street Fighter V, Mortal Kombat X, Guilty Gear, Blazblue, Skullgirls, Marvel vs Capcom, and so many more...people are buying these games across multiple consoles and PC, simply because they are a part of the fighting game genre. Then you have comedy types of games of the genre, such as Divekick, that sells well not only due to the fact it's a fighting game, but because the scene comes together to make things like this happen, and be supported.