Sharing your referral link earns you free headshots when someone buys through it. Find it under Referrals in the personal sidebar.

Your Referral Link holds a link ending in ?via= and your own referral code. Copy
puts it on the clipboard, and the buttons underneath share it directly by Email, X,
WhatsApp, or Facebook.
The link works anywhere — a message, a bio, a signature. What matters is that the person arrives through it, so the purchase is credited to you.
Your Referrals lists everyone who has bought through your link, with a running total in the corner. Until the first one arrives it reads "No referrals yet — once a friend buys through your link, they'll appear here."
When a referral qualifies you get an email with a claim link.

The page confirms what you have earned — "Your referral led to a purchase. As a thank you, you've earned 20 free headshots" — and explains the split: pick 4 background and clothing combinations, and 5 photos are generated for each.
Choose Your Styles starts the picker.