Would you say that the following kinda sums things up?
1. According to the Firaxis license, someone could not take some Civ code and modify it and then release it under the GPL. This would violate the Firaxis license and would be falsely claiming that the code is GPLed.
2. According to the Firaxis license, someone could not write code from scratch specifically for Civ and release it under the GPL.
3. However, let's say someone wrote some code for another purpose (unrelated to Civ) and released it under the GPL. That GPLed code could not be used in Civ mod (unless you never distributed the mod).
4. However, let's say that someone did take some GPLed code from the situation as outlined in point #3, and made it into a Civ 4 mod/library and released it under the GPL. Under this special situation, not only would this person be in violation of the GPL; but, if Firaxis also used this person's code, they'd also be violating the GPL, because the code essentially does contain true GPLed material (unrelated to Civ) at it's heart.
