All of this is a summary and rough. I would ask you read both goodbye post from them on the site. They explain better.
Kotaku lost 1 Black & Brown person. So their staf being diverse literally took a dive.
But the main reason Gita & Josh left Kotaku, is because of what happened at Dead Spin. The rich dude that owns the over media company told dead spin to stick to sports only. They didnt because a good website makes thoughtful work.
Then deadspin eventually all left, all of them. Folks that are a part of the media company formed a union to protect themselves against douche bag rich guy owner.
Anyway his whole thing is stick to what you're supposed to do. That means writing about real diverse shit and the space being inclusive isn't really a thing because of it.
Thus we have another gaming site that got less diverse because of it. And they both also high key that games journalism as is isn't an industry for younger, queer and Black folks.