Coinbase is now paying $10 worth of XLM to take a short course and then offering 4 referral links worth $10 each.
Log into Coinbase and go to coinbase.com/earn/ to sign up for the XLM course and other course.
Also, if you feel like being cool, you use it can use our referral link as a thank you: coinbase.com/earn/xlm/invite/c9sk7gmh.
NOTE: I strongly suggest all Coinbase users go through all the Coinbase earn programs. They only take a few minutes, are informative, and are the simplest ways to get free crypto.