The website has disallow rules for Ahrefs Bot.
https://ahrefs.com
Robots.txt
Get access to data on 8,629,991 websites Ahrefs Bot Disallow Customers. We know of 4,246,648 live websites using Ahrefs Bot Disallow and an additional 4,383,343 sites that used Ahrefs Bot Disallow historically and 2,363,502 websites in the United States.
Get a list of 8,629,991 websites using Ahrefs Bot Disallow which includes location information, hosting data, contact details, 4,246,648 currently live websites and an additional 2,198,152 domains that redirect to sites in this list. 4,383,343 sites that used this technology previouslyand 2,363,502 websites in the United States currently using Ahrefs Bot Disallow.
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