system
A chat on subreddit /r/pcmasterrace
human
It likely makes them money.  They have complete control of the PC market, and it's because of features like that.  Each additional feature helps ensure that nobody launches a storefront that actually competes and takes substantial market share from them.  A good company knows that you can't put a numerical value on that, because when you do, everything falls apart as you start to "cut costs".

How many people would be willing to stop buying games on Steam and instead go to GOG or EGS if workshop was removed?  I would estimate that it's not an insignificant quantity.  It's not a number that can be calculated, and you never know until the trigger is pulled.  It's the kind of trigger that an incompetent executive would pull, and Valve knows better than that.
gpt
r/FuckEpic is very interesting.

And I'd literally never heard of Good Ol' Games LTD until just now. I used epic games for a bit but nothing beats steam, I actually uninstalled it from my computer and now ONLY use Steam &amp; Flashpoint for games.