GC are being traded but not as much as the GM says. I trade in space and i buy and sell a ton of goods ALL the time and i never trade for then a few hundered at a time.(one in while)
Personally they need to add a few more ways to make GC sure you can make GC moving up the war levels but after you do your stuck with crappy income. The difference between war level 7 and war level 11 is only 4T in cash, Yet you fight double the wings, 200 MORE quility in the higher level and stealths double attack and do more damage(note they do MORE damage and attack more then players are allowed to).
Honestly to make the higher levels worth more, i think they shoudl be adding GC to the mix. Instead of taking over the country in war level 10+ there should be a second choice. Clicking just end the war wouldnt give us the nation but give us GC equal to the cash assests we would have gotten. 11T = 220GC Getting that each war would be WELL worth moving up the war levels.
(side note)
they need to bring back the old war income stats.
1.5T * your war level.
Come on really? All the stuff i have to fight in war level 11 and i get 11T? As i proved before you spend a MIN of 5T in just ammo alone (if it was low Q.)