Coinbase referral-program
The Coinbase referral program lets you earn a bonus for each successful referral registered to your account!
How it works:
Start by visiting the referrals page. From this page you can copy your referral link or send an invite email to a friend.
Your friends can click the referral link (or the link in the email) and sign up for a Coinbase account.
They will then complete their account and initiate a buy or sell in one of our supported countries.
If your friend visits coinbase.com/trade and initiates a buy or sell of $100 USD or more (or 100 USD equivalent of your domestic currency) within 180 days of opening his or her account, you both will receive a 10 USD (or 10 USD equivalent of your domestic currency) referral bonus when the order completes. Orders can take up to 4 business days to complete.
Source link http://bit.ly/2DSTvMb