The website has disallow rules for Alexa's ia_archiver bot.
https://support.alexa.com/hc/en-us/articles/200450194-Alexa-s-Web-and-Site-Audit-Crawlers
Robots.txt · AI Bot
Get access to data on 10,600,083 websites that are Alexa Bot Disallow Customers. We know of 5,217,515 live websites using Alexa Bot Disallow and an additional 5,382,568 sites that used Alexa Bot Disallow historically and 2,289,738 websites in the United States.
Get a list of 10,600,083 websites using Alexa Bot Disallow which includes location information, hosting data, contact details, 5,217,515 currently live websites and an additional 552,421 domains that redirect to sites in this list. 5,382,568 sites that used this technology previouslyand 2,289,738 websites in the United States currently using Alexa Bot Disallow.
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