It’s called staying away from venture capital. It really is as simple as that. Because Valve has a lucrative business model they have no need or desire to raise capital from outside investors, therefore there is nobody to squeeze them for value at the expense of their customers.

If you watch Cory Doctorow’s talk where he coined the word “enshittification” he explains how the process works, and it starts with outside investment. Enshittification is just a catchy term for value extraction, from the perspective of the customer.