Valves secret is that selling digital games is profitable 100% of the time, so they never needed to enshittify.

A lot of services are straight up unprofitable and need to go to extreme lengths of ruining the experience just to make a single positive dollar. Those lengths are also often poorly thought out or actively destructive to the platform. Valve just sells games with essentially 0 overhead past servers (insanely expensive, btw, but you know what i mean)

Turns out that the best business plan is a profitable one out of the gate with people who care about their work instead of vampires that bleed your customers dry