Although it would be unrealistic to expect a multiplayer online game to be opensource software, it would certainly help to sort certain issues quicker!
As an example, the following article describes how a GTA5 player decided to sort out the infamous loading times of the game.
The time all the players world-wide had to wait for the game to load adds up to a decade… that’s a lot of loading minutes and energy dedicated just to get the thing going!
Open source software has many advantages, from avoiding vendor lock-in to distributed round-the-clock problem solving. Which are just some of the reasons, we like it so much.