Its good for GameStock management who will end up running a much bigger business. https://investor.gamestop.com/news-releases/news-details/202...
Game Stock management is essentially claiming that they can run Ebay better than the current management so Ebay shareholders will end up better off by selling to Game Stock: they get some cash and shares in a business that will be mostly a better run Ebay. Very possible bad for GameStock shareholders who will end up with a smaller stake in a bigger business.