The website has disallow rules for Ahrefs Bot.
https://ahrefs.com
Robots.txt
Get access to data on 8,872,754 websites Ahrefs Bot Disallow Customers. We know of 3,744,902 live websites using Ahrefs Bot Disallow and an additional 5,127,852 sites that used Ahrefs Bot Disallow historically and 1,945,487 websites in the United States.
Get a list of 8,872,754 websites using Ahrefs Bot Disallow which includes location information, hosting data, contact details, 3,744,902 currently live websites and an additional 2,004,911 domains that redirect to sites in this list. 5,127,852 sites that used this technology previouslyand 1,945,487 websites in the United States currently using Ahrefs Bot Disallow.
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