Exactly. The question is how much is really necessary to operate that service. We as a species really need to stop thinking about constant growth and more and more wealth, and that includes growth and wealth that is “reasonable” compared to other extremely greedy people. Right now it looks like Steam is growing to infinity and making more and more money. They’re the same like everyone else trying to make more and more money. Of course they’re more ethical and they return value for that money, but they’re still part of the same system of infinite growth that is not sustainable.
This infinite growth is happening because they extract more value than they require. If they extracted as much value as they require to sustain their business, they wouldn’t grow. But of course constant growth is what everyone expects and thus no one sees a problem with it.