I do have a code; thanks for asking! This is a cut and paste from the email I received when I signed up, back in June:

Important: This is your bonus referral code: d8nehnu84s

We encourage you to give this code to anyone you would like to invite to sign up for Grantcoin Basic Income -- your family, friends, coworkers, acquaintances, friends and followers on social media, etc. When they sign up, if they use your referral code, you'll receive 100% extra Grantcoin the first year for every person who signs up with your code! (Sign up 5 people, get 5 times the Grantcoin. Sign up 10 people, get 10 times, and so on).

This link will take people to the Grantcoin signup page with your referral code already pre-entered:
http://www.grantcoin.org/get-grantcoin/basic-income/?referral-code=d8nehnu84s

Thanks in advance to you and anyone else who may use my referral code!