I have made a similar observation in the past. Game development is such a extremely high competitive area that any legal method to save time and use someone els

I have made a similar observation in the past. Game development is such a extremely high competitive area that any legal method to save time and use someone else code will be used unless it breaks the core business model. Delaying a release of a game by a few months because developers are re-implementing a xlm parser is not an option. If I remember right, Starcraft 2 by Blizzard uses LGPLv3 code, and the software credit list is very long. I can imagine the cost and delays if they had arbitrary chosen to restrict themselves to specific licenses. Focus on what is the core part of a company. For most game companies that seems to be about developing multiple games at the same time, finding one that is good enough to develop to a finished product, while surviving on the last released game.