In 2018 a group of Valve staff tried to figure out just how efficient they were being—and found they were making more money per head than Apple, Facebook, and nearly every tech giant out there
Is 30% on average "huge" considering the platform and total number of averages monthly users? I know that number does move around a bit as well.
I guess considering the ease of use for users and the fact that other platforms exist, they might be considered a monopoly only because nothing else of quality has shown up. It's not like they're buying out competitors and paying politicians to create laws and expectations to give them a competitive advantage. They're literally just better than the other shit. Except arguably GoG which is solid in its own right, though not in the same ways as Steam.
Last time I checked, Epic Games has plenty of money to compete. Monopoly implies competition is actively being stopped. Valve hasn't done much to stop competition other than making a good product that people use.
When valve was establishing steam, 30% was justified. They had to invest in the product. They took a risk. They don't have to now and they are profiteering.
And valve have admitted they're making more profit than anyone else in the space. I'm not saying they shouldn't be allowed a profit, I'm saying there's an argument that they (and Apple via the Apple store) are taking too much from the work of others
And that argument is idiotic, as proven by the fact that even bribing people to their shitty Epig Store, Epic can't compete with the value Steam provides.
Differently from Apple, Steam hasn't put any barriers in place to stop competitors nor have they forced exclusivity on publishers for their platform.