I feel like this doesn't address what I was saying. Sure, the stakes are low - it's just video games. But some people care about this stuff! And the question is, basically, whether they want video games journalism to be just an extension of publishers' marketing departments or whether they want it to be independent. People who care about this stuff should be annoyed at efforts by publishers to control coverage like this. The whole point is that you don't have to take this fatalistic "that's just the nature of the beast" position here - consumers have some ability to determine how publishers respond.
I thought we were talking about the angle of "what can Kotaku do about it?" The answer to that question is nothing. They either stop publishing the leaks and get back in their good graces, or they continue going against the publisher's wishes and do not get access.
The problem is your point of do we want game journalism to be "just an extension of publisher's marketing departments." My point was that Kotaku has virtually no choice in the matter. They will always be an extension of the marketing department to a certain extent because they do not have the tools to go against their wishes like a government reporter would because of sunshine laws, FOIA, freedom of the press, etc. If Kotaku wants first-run news and the publishers control that news, they have to play along or hope they can get enough leaks to make due.
Your point, as I understand it, is "why can't the publisher just play along AND let Kotaku run pieces the publisher doesn't want?" You've answered your own question though--consumers have that power to force the publisher to change, but they just do not care. We all knew Fallout 4 would be a bug ridden shitshow before it was released, and it sold a zillion copies. Do you think those same people are going to crack back against Bethesda by not buying Fallout 4 just because Kotaku isn't getting the same insider access that IGN or someone is getting? Hell no, they will just go get that insider access elsewhere and still buy the product. That's the only power the consumer has in any of this and we all know they will never exercise it (see, eg., season pass DLC, microtransactions, pay-to-play multiplayer, on-disc DLC, etc.).
Kotaku is just fucked here because the consumer can't be bothered to give a shit, and the publishers know that full well.