epic. All of which are perfectly successful without using steam.
This entire lemmy post is about someone being upset that Epic is successful enough to have an exclusive. If a few large players can still succeed without Steam, it's not proof that Steam's practices aren't making the market worse for consumers.
If they can’t make sufficient revenue without valves advertisement and distribution network, then maybe the service is worth the price valve charges for it.
Listing your product on Steam isn't advertising. They're not promoting your game unless you pay them.
Let's make an analogy. Is it reasonable for Nordstrom to go after a company selling the same product at Wal-Mart cheaper?
Valve has done nothing to stop consumers from using other stores
If we lived in a world where Epic was allowed to compete with Steam on the only way it can, with lower prices, we might have cheaper prices on Steam, and a more robust competitive market. This is why Valve is doing this price fixing. They know that consumers are price sensitive, and a $55 price tag on a new game going for $60 on Steam would be a disaster for them. They know their price fixing department would have to become a "watch for prices on other platforms and adjust our prices / cut to be competitive" department.
Evidence? Even if we went down the list of launch Epic exclusives and somehow determined that the price is equivalent to what it would launch at on Steam, the economics of an exclusive launch on a smaller platform are going to be completely different.
Maybe ask the publishers who got together to sue Valve for the ability to do this, and check their many examples of comms with Valve where Valve was upset that publishers were offering lower prices on other platforms.
There is a phenomenon called price elasticity. Example, a 5% price cut might result in 10% more units sold, giving you higher revenue.