I have read your link but they didn't say the EGS is at loss specifically because of the 12% cut nor that the Fortnite money is subsidizing the lower cut.
It could be that the EGS is at loss because creating a new store and client from scratch costs money ?
To be honest here, we don't have the numbers to say exactly how much margin Valve is making. But my guess is the following: if EGS estimated that with a 12% cut they could be profitable if they had enough customers, it makes me think that the cut of valve is way overinflated in regards to their costs.
And yes Fortnite is awfully predatory. But the topic is Valve and Steam there ๐
Even better with some tiers:
Tier 1 - your post is restored but with a disclaimer that an appeal was made
Tier 2 - your post is restored with no disclaimer. Nobody will know you paid for an appeal!
The possibilities are endless! /s