The website has disallow rules for Sogou Bot.
https://www.sogou.com/
Robots.txt
Get access to data on 22,612,268 websites that are Sogou Bot Disallow Customers. We know of 12,557,537 live websites using Sogou Bot Disallow and an additional 10,054,731 sites that used Sogou Bot Disallow historically and 560,104 websites in the United States.
Get a list of 22,612,268 websites using Sogou Bot Disallow which includes location information, hosting data, contact details, 12,557,537 currently live websites and an additional 166,760 domains that redirect to sites in this list. 10,054,731 sites that used this technology previouslyand 560,104 websites in the United States currently using Sogou Bot Disallow.
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