a policy that requires other marketplaces to sell at the same price as on Steam

or what?

• a working shopping cart

Eh, more like Epic approached them with a suitcase full of money, that's very different.

People don't hate on Epic because their store has content. They hate on Epic because they tried to buy market share with exclusivity deals. Nobody wants PC gaming to turn into the streaming services.

Thanks. So TLDR:

1. PMFN (Platform Most-Favored-Nations clause): Valve forces publishers to price games on other platforms at the same price or higher than Steam. This is an anticompetitive monopoly because publishers can't sell the game at lower prices on platforms with a lower cut than 30%, which would improve competitiveness. Very valid point
2. Keys that publishers can sell on other storefronts are limited. This point is moot. The fact that Steam allows you to activate a product that was purchased elsewhere and then use their infrastructure to download the game is way more than they have to do. They can completely make the rules here as this is basically a free service that you get from Valve.
3. Some murky points about Valve policing review bombing that isn't explained properly.

Valve devotes only a small percentage of its revenue to maintaining and improving the Steam Store, and dedicates very few employees to that effort.

Okay yeah I was annoyed that it took Epic's store to make Valve update their ancient UI, but Proton has gone a long way to improving my opinion of them (and it's open source to boot).

Also is a shame that the court won't have the background to know that invoking EA's complaints about anti-competitiveness and price gouging is so completely laughable.

No, it’s saying if you make a good game and launcher then you don’t need to rely on one of the storefront that take 30% like epic or Valve. Idk what GoGs cut is but I’ve also never bought anything from there

You're right and I'm wrong. I guess I'm out of touch - what did the Wolfire guys do since then that makes you dislike them?

I think there was some cross-pollination for a couple years beyond that. Sounds like they sold Humble off to be its own thing, but the Wolfire guys were still running it until 2019 (see Wikipedia quote below). Either way, they've got out of Humble well before they filed this suit.

Rosen and Graham, the founders of Humble Bundle [and the CEO and COO, respectively, of Wolfire Games], announced in March 2019 that they have stepped down as CEO and COO of the company, respectively, with Alan Patmore taking over the company operations.

Wolfire Games created the original Humble Indie Bundle, but they've been divested from it for a few years now. From Wikipedia:

The Humble Bundle concept was initially run by Wolfire Games in 2010, but by its second bundle, the Humble Bundle company was spun out to manage the promotion, payments, and distribution of the bundles. In October 2017, the company was acquired by Ziff Davis through its IGN Entertainment subsidiary.

The comment above that Humble's the ones suing Valve here is inaccurate.

Yeah, I’m pretty sure both are run by the same dude. He got butt hurt by valve’s cut about the time he started Humble Bundle.

Developers already do that fairly often. Typically indie devs. They will sell their game directly for lower prices than listed on steam.