I don't think you're really understanding what's being done.
Even though spindoctor actually explained it quite eloquently.And neither was the person he was responding to.
Edit: since this hit the top of the page, I'll quote it again. Many people probably aren't familiar with the mechanisms at play here:
The people complaining about this do not even understand enough about the Steam ecosystem to realize why this is happening.
This is going to affect developers (and I use that term in it's most liberal interpretation) who request half a million keys and sell (or "sell") them on Russian sites you've never heard of for 3 cents a piece.
How does it work?
Suppose I'm a developer. I fire up the free version of Unity, browse the Unity asset store and download some free assets, package them together and put it up on Steam. It costs me $100 for the Steam Direct fee. These are the low quality, trash asset flips that bother everyone except Jim Sterling who loves to shine a spotlight on them. So, no one is going to buy my crap game. No way to earn money from sales. What do I do now?
I request 300,000 keys from Valve. Once I have them, I activate those 300,000 keys on 300,000 bot accounts that are used for only one purpose; card farming. Suppose I added 6 Steam trading cards to my game. That means each of the bots will idle 3 cards per key, which is 900,000 cards in total. I then go and sell them on the Steam market. It does not even matter what price they sell at. The absolute minimum price for a card is 3 cents and the developer gets 1 cent from every sale. There are people on Steam who are in love with their Steam profile level and will buy any badge to increase that level. These people will buy up all my 900,000 cards and even if I got 1 cent per card, that's $9000 earned. For a $100 investment.
This is the reason Steam is plagued with all these asset flip games. Nobody is buying them or playing them. It's the developers putting up anything on Steam so that they can earn money on the backend with card sales.
What Valve is trying to do here is to stop this trend. If they stop giving out keys in bulk then this sort of 'business practice' hopefully dies and that in turn will mean all these trash games stop getting onto Steam because it's not worth it to do this anymore.
But of course this won't stop some from crying out about how Valve is abusing their 'monopoly' and how terrible it is for consumers and developers and how evil they are. So, carry on with that I guess...