The website has disallow rules for Microsoft Bing Bot.
https://blogs.bing.com/webmaster/2012/05/03/to-crawl-or-not-to-crawl-that-is-bingbots-question/
Robots.txt
Get access to data on 21,442,409 websites that are Microsoft BingBot Disallow Customers. We know of 10,639,648 live websites using Microsoft BingBot Disallow and an additional 10,802,761 sites that used Microsoft BingBot Disallow historically and 488,928 websites in the United States.
Get a list of 21,442,409 websites using Microsoft BingBot Disallow which includes location information, hosting data, contact details, 10,639,648 currently live websites and an additional 455,214 domains that redirect to sites in this list. 10,802,761 sites that used this technology previouslyand 488,928 websites in the United States currently using Microsoft BingBot Disallow.
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