Yes, there's one promo code, which will give you a clothes. As said Badjoshua, (type to the chat: /promocode or /promo nightrunner or over/through STS Nexus (at main page in the game) in the → offers, you click on 'Enter Promo Code' and write there nightrunner.)
I think, you know that, but I wrote it, if the somebody don't know, didn't know possibly...