This version of Wix is 'ad free' meaning it is on a premium plan above the 'connect domain' package.
https://wix.com
Content Management System
Get access to data on 3,479,265 websites that are Wix Ad Free Customers. We know of 1,908,038 live websites using Wix Ad Free and an additional 1,571,227 sites that used Wix Ad Free historically and 1,430,904 websites in the United States.
Get a list of 3,479,265 websites using Wix Ad Free which includes location information, hosting data, contact details, 2,427,407 currently live websites which includes 519,369 domains that redirect to sites in the list. 1,571,227 sites that used this technology previously and 1,430,904 websites in the United States currently using Wix Ad Free.