Amazon (the retailer portion) and AWS, and probably their logistics wing
This also works for Amazon retail, they should not be allowed to sell on their own marketplace (they have to choose, they are either a marketplace or a seller)
(PlayStation is almost in the same boat, except they have significant sales in regions where PC gaming is much smaller than in the US.)
Not that it matters.,Microsoft has done a spectacular job of killing Xbox even with its ability to sustain setting money on fire for the past decade. Xbox has been an unmitigated disaster since Xbox One.