The website has disallow rules for Google Media Partners.
https://ads.google.com
Robots.txt
Get access to data on 7,973,071 websites that are Google Media Partners Disallow Customers. We know of 4,788,456 live websites using Google Media Partners Disallow and an additional 3,184,615 sites that used Google Media Partners Disallow historically and 2,968,271 websites in the United States.
Get a list of 7,973,071 websites using Google Media Partners Disallow which includes location information, hosting data, contact details, 4,788,456 currently live websites and an additional 310,924 domains that redirect to sites in this list. 3,184,615 sites that used this technology previously and 2,968,271 websites in the United States currently using Google Media Partners Disallow.