Technology

That's the same for any digital platform, though. Literally, any gaming store except for GOG won't let you take your library with you. You don't own the game as far as any of them are concerned. You're claiming Steam is some kind of monster because their platform for games you don't own is better than other platforms for games you don't own. Because their platform doesn't sucks, it earns them a lot of business. That's it. That's the magic sauce.

With options, if Stream sucked, people would go elsewhere.

If Steam had anything resembling a monopoly they'd do everything they could to remove platforms offering the same games. The number of platforms has only expanded since they started.

If Stream was a monopoly, they'd not only undercut others, they'd pay for exclusivity rights. Steam let's developers sell their own keys from anywhere the developer wants, while taking no cut when that happens, even though Steam still has to front the bandwidth and storage for the game to be played.

If Steam was a monopoly, they'd buy up smaller firms, buy businesses with similar, but competing services, or take another company's product, reverse engineer it, and make their own undercutting the original. They've done the opposite at every turn.

You really don't understand monopolistic tactics. You're not going to understand it, either, since you've continues to conflate good business decisions that earn trust and adoption with anti-consumer practices. Steam makes good business decisions, listens to their customers and developers about ways to make the service or products better, and has more business because of it. They have a better product without stooping to the air a in lot of current businesses are pulling.

That's it. 70% market dominance doesn't fucking matter. They could have 90% and it still wouldn't be a monopoly with their current strategy. Other businesses need to suck less.