Not sure about all of these, but some of the logos are actually incomplete: the Microsoft logo is only ever used together with the 4 "ex-Windows" colored square

Not sure about all of these, but some of the logos are actually incomplete: the Microsoft logo is only ever used together with the 4 "ex-Windows" colored squares, the Spotify logo always contains the "spotify icon"; in others, like the Google or the ebay logo, the letters themselves are usually colored. So it looks like it took quite a bit of manipulation to get to the point where all logos look the same. You could add other "logos" to the list, e.g. Lufthansa (https://www.lufthansa.com/de/en/homepage https://www.lufthansa.com/de/en/homepage) - which is however also incomplete without the crane symbol.