I'm not so sure. Most changes people seem to make to their starcraft is enabling cheating. "Maphacks" (having the ability to see what the enemy does, regardless

I'm not so sure. Most changes people seem to make to their starcraft is enabling cheating. "Maphacks" (having the ability to see what the enemy does, regardless of normal game rules), and macros (having lots of actions performed in one go, because a significant part of the game is controlling lots of units correctly). All of those would become completely uncontrollable if open sourced.