You can invite/refer a friend to Blinkist in the following way:
1. Open the dropdown menu by clicking on "Account" on the top-right of the main page .
2. Click on 'Invite Friends'.
3. Share your personal referral link with your friends! For every direct sign-up through the link, your friend will get an extra week of trial access and you'll also get an extra week tacked on to your account if you're a basic user.