They’re literally doing capitalism. M - C - M’ is described in the first part of Capital. This is money operating as capital. Buy a commodity for M, then sell it for M’ that is greater than M. You have no interest in the use value of the commodity. The only thing that matters is it’s exchange value.
The average person in a capitalist country has 0 idea what capitalism is, and even most lefists haven't read Capital (not that I blame them, it's a slog). Scalping is viewed as "cheating the system", and if you press most people on it being capitalism functioning normally, they will either say that it's not real capitalism or that it's still wrong and should be illegal.
IME, most g*mers view video games as a meritocracy, where skill is the only thing that determines how well one does (see how upset they get when something is unbalanced). As a result, they're generally speaking opposed to "unfair" tactics, like Pay to Win systems, and it's easy to see how this expands to include scalping. If it weren't for the utter suppression of leftist views in the west and the ongoing multi-billion dollar fascist propaganda industry, I'd expect a lot more of them would come around to some sort of socialism.
It's also a matter of legitimacy and classism. Most people will recognize that small-time, "unofficial" capitalists and their actions are repulsive (see all the lib outrage at the price gougers selling hand sanitizer out of their garages early in the pandemic), but if you give that same small-time capitalist a jet-ski dealership they're suddenly legitimate and above questioning, even if they continue to be just as much of a scumbag.
See how upset most G*mers get at anyone bringing up the possibility of someone cheating. Unless it's glaringly obvious wallhacking or teleporting, most will say "git gud" or "mad because bad" because they want to keep the facade of meritocracy for all but the most obvious cheaters.