The Wix Affiliate program uses the first cookie model: 30 days from click to Premium. This means that Wix attributes referrals and gives credit based on the first time click. 

Let’s say a potential user went into John’s Wix affiliate link or through a Wix search link on a Sunday. The next day, they clicked on Mary’s affiliate link, and that Tuesday they signed up to Wix and upgraded their account. In this case, John would receive the affiliate credit, or it would be credited as a Premium account originated from the search segment if that was the case. 

The cookie is valid for 30 days and Wix only pays for the Premium accounts that were created in the first 30 days since that cookie was created in the user’s browser.