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 9,305,407 websites that are Twitter Platform Customers. We know of 1,722,294 live websites using Twitter Platform and an additional 7,583,113 sites that used Twitter Platform historically and 853,654 websites in the United States.
Twitter Platform websites that are also using other technologies.
Get a list of 9,305,407 websites using Twitter Platform which includes location information, hosting data, contact details, 1,722,294 currently live websites and an additional 1,763,691 domains that redirect to sites in this list. 7,583,113 sites that used this technology previously and 853,654 websites in the United States currently using Twitter Platform.
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