^ Customer service
This is very trivial, but I needed a new mouse at home, and being a World of Tanks guy, I ordered WoT Razer Deathadder mouse, which came with a code for a relatively rare tank.
I received the mouse and noticed that the code had an expiry date of Dec 31, 2014.
.
I sent in a service ticket to WarGaming, but never really expected to hear back. A week passed, and I received an email from them letting me know that my Pz IV Hydrostat had been added to my garage. Nice, and for a gaming company, pretty unexpected.