The page embeds the Twitter platform in one method or another.
http://twitter.com/about/resources
JavaScript Libraries and Functions
Get access to data on 8,935,603 websites that are Twitter Platform Customers. We know of 1,333,923 live websites using Twitter Platform and an additional 7,601,680 sites that used Twitter Platform historically and 624,309 websites in the United States.
Twitter Platform websites that are also using other technologies.
Get a list of 8,935,603 websites using Twitter Platform which includes location information, hosting data, contact details, 1,333,923 currently live websites and an additional 1,367,074 domains that redirect to sites in this list. 7,601,680 sites that used this technology previouslyand 624,309 websites in the United States currently using Twitter Platform.
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