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 4,798,330 websites that are Wix Ad Free Customers. We know of 1,923,419 live websites using Wix Ad Free and an additional 2,874,911 sites that used Wix Ad Free historically and 1,425,246 websites in the United States.
Get a list of 4,798,330 websites using Wix Ad Free which includes location information, hosting data, contact details, 1,923,419 currently live websites and an additional 437,910 domains that redirect to sites in this list. 2,874,911 sites that used this technology previously and 1,425,246 websites in the United States currently using Wix Ad Free.