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 8,982,629 websites that are Twitter Platform Customers. We know of 1,344,062 live websites using Twitter Platform and an additional 7,638,567 sites that used Twitter Platform historically and 629,303 websites in the United States.
Twitter Platform websites that are also using other technologies.
Get a list of 8,982,629 websites using Twitter Platform which includes location information, hosting data, contact details, 1,344,062 currently live websites and an additional 1,410,242 domains that redirect to sites in this list. 7,638,567 sites that used this technology previouslyand 629,303 websites in the United States currently using Twitter Platform.
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