The website has disallow rules for Sogou Bot.
https://www.sogou.com/
Robots.txt
Get access to data on 15,653,291 websites Sogou Bot Disallow Customers. We know of 4,736,754 live websites using Sogou Bot Disallow and an additional 10,916,537 sites that used Sogou Bot Disallow historically and 2,163,944 websites in the United States.
Get a list of 15,653,291 websites using Sogou Bot Disallow which includes location information, hosting data, contact details, 4,736,754 currently live websites and an additional 295,468 domains that redirect to sites in this list. 10,916,537 sites that used this technology previouslyand 2,163,944 websites in the United States currently using Sogou Bot Disallow.
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