Hey,
In case you didn't know, Nvidia has been running a promotion where you could get 10.000 Golden Eagles when buying Nvidia hardware. Well, people has been selling these codes left and right, so it's possible to pick up a cheap code on Ebay, among others. I just picked up 10.000 eagles for 13 pounds, 5.000 Eagles through Gaijin costs my local equivalent of 15 pounds.
The code is redeemed through Nvidia's website and attached to your account. It can only be done
once.
This may not be for everyone but might as well get double the eagles and save a bit of money, in case you wanted a premium tank, get a Talisman or boost some research