The points linked above allege Valve will delist a game from their platform if the price is lower off-platform (even for non-key sales), correct?
This is called a “Platform Most Favored Nation” clause, and it has anti-competitive effects. It is controlling the price off-platform using the leverage of market share to coerce behaviors out of publishers.
Please also link me this European court case, I have been unable to locate it myself.
Again, I am really wanting to see this EU case you reference, because this is an issue I have been reading up on. Do you have a reference for me?