The Coinbase referral program now offers both new and current users $10 worth of free BTC when a current user refers a new user who signs up for a Coinbase account and buys $100 of Bitcoin or more.
To earn a $10 Bitcoin bonus, just sign up via this Coinbase Referral Link, and then purchase $100 of Bitcoin or more to qualify for your $10 Bitcoin bonus.
Updated 5/7/2019 – Get $50 in Free Stellar Lumens XLM: Check under the Dashboard within your Coinbase account for an offer to “Earn $50 of Stellar Lumens” when you learn about Stellar and Coinbase Earn. Just complete the steps to earn $50 of XLM, which you can cash out to PayPal or your linked bank account.