How the hell do i use referral codes? I send one to my friend but when he registered on Nutaku there were no window to input it. He just registered for nothing. How to use it?!?!??
It's not a referral code, it's a referral link. You find it in your profile, you send it to the person and he registers by using said link.
Referral links look like this: https://www.nutaku.net/signup/invite/id/166577 with the last number being your own ID