Earlier quoted context omitted.
Developers don't pay that 30 percent, users do. You could even say that steam is a customer of the developers (I buy your game at x to sell for y), and the average person is a customer of steam and the devs. I don't really see the customers or the developers as the core. Both groups tie into each other in a big network effect.
That is a pointless distinction. 30% of the price is distributed to Valve instead of developers. Whether that results in developers obtaining lower profits or users paying higher prices is entirely subjective; that depends on what would happen otherwise, which is categorically unprovable.
If it's a point of issue between me, Valve, and the game developers, at the end of the day it's my decision that matters because I have the money and if I choose not to spend it the whole thing stops working.
Take away valve and then I go straight to the source and purchase games from the developers directly, it's going to be inconvenient, but it'll be fine.
Take away the developers and valve will fund game development and start making their own stuff like Netflix has with all the media companies.
Take away the customers? Game over.
Of logic works all right when you're talking about Google and the fact that the advertisers are the real customers, because of the end of the day the advertisers have the money and when it is advertisers versus users the advertisers always win.
It's important to be the guy funding the system at the end of the day, otherwise you get screwed.