The website has disallow rules for Sogou Bot.
https://www.sogou.com/
Robots.txt
Get access to data on 15,823,117 websites Sogou Bot Disallow Customers. We know of 4,604,516 live websites using Sogou Bot Disallow and an additional 11,218,601 sites that used Sogou Bot Disallow historically and 2,478,350 websites in the United States.
Get a list of 15,823,117 websites using Sogou Bot Disallow which includes location information, hosting data, contact details, 4,604,516 currently live websites and an additional 242,939 domains that redirect to sites in this list. 11,218,601 sites that used this technology previouslyand 2,478,350 websites in the United States currently using Sogou Bot Disallow.
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