BlockFi
$10 Bitcoin free
Get $10 free in Bitcoin when you sign up for BlockFi using a friend’s BlockFi referral code, deposit $100 or more into your BlockFi Interest Account (BIA), and maintain a $100 or more balance in your BIA for at least 30 days after your initial deposit.
Once you do so, the referrer gets a bonus of $10 in Bitcoin if you are one of their first five referral or a bonus of $20 in Bitcoin if you are their sixth or greater referral.