You need to sign up for an affiliate account at https://pixc.com/affiliate. After you submit your application, Pixc will review it. Once approved, you will get a notification email.
You will then be able to log in at https://pixc.com/dashboard/login. In your Pixc dashboard, you will find a share link. You will also be able to invite via email, Twitter or Facebook.
We pay affiliates 20% commission on image credits redeemed, for up to a year of the user signing up via your affiliate link. You will find more information here: https://pixc.com/affiliate-terms.