DemonPrinceI like that idea, and would like to expand it. I've always wanted to change city and country names, because as North Canada, for example, after you invade South Canada, you're the only Canada. I'm not sure how this would be implemented, but having an option to change country/city names for goldmark could be a good idea.
I have also thought something similar, but I always wonder how it would be implemented.
Perhaps adding new mechanics to the game will make it more viable to have new ways to use GM as long as it does not alter the game's balance.
One thing I wish I had was a map editor. Who likes to play roleplaying would like this, even more so if it were possible to change the provinces, names and even adapt the units for the time you want, for example: a roleplaying that happens in 323 BC the warships will become triremes, the tanks on elephants, heavy tanks on armored elephants, the railway cannon would become the siege tower and among many other possibilities.
I have no idea how it would generate money for Bytros, however it would attract enough players which would generate money because they would buy GM.

