Presuming that the code is the company's asset, and doesn't use third-party licensed assets. Otherwise you'll be in line for a refund with all of the other company's creditors. Or you get part of the code that you can't use.

I don't think most game owners could take the server side software and assemble it into working servers their game could contact and use. This isn't realistic and needs something to change at the fundamental server design side and the game development side. A silly answer is regulations about how you can and can't make a game. Another silly answer is a cottage industry doing game server hosting that's required to be third party by law. I don't have any good, realistic ideas that aren't just trying to force game developers to build games differently (or build different games). Maybe that's the cost here but is that better than just letting angry customers influence the market?