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 10,931,146 websites that are Alexa Bot Disallow Customers. We know of 5,029,184 live websites using Alexa Bot Disallow and an additional 5,901,962 sites that used Alexa Bot Disallow historically and 2,216,532 websites in the United States.
Get a list of 10,931,146 websites using Alexa Bot Disallow which includes location information, hosting data, contact details, 5,029,184 currently live websites and an additional 530,072 domains that redirect to sites in this list. 5,901,962 sites that used this technology previouslyand 2,216,532 websites in the United States currently using Alexa Bot Disallow.
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