5 questions and $ 2 each, sharing your link at the end, you can take up to $ 10 for each person https://pronunciaciones.com/coinbase-quiz-questions-and-answers-to-earn-eos/
Click on the Coinbase referral link then create your account and you can start using coinbase and buying bitcoin, ethereum and litecoin. The 10$ coupon code will be automatically added to your wallet once you have trade more than 100$. You can share you coinbase coupon link & coinbase voucher to invite your friends and get 10$ of free bitcoin when they activate their account.