A different kind of Billionaire Club

Google and Facebook with 5 billion AP calls per day. Twitter has 3 billion per day. Ebay has 8 billion per month. NPR gets 1.1 billion calls per month for its API-delivered stories. Saleforce.com gets 50% of its traffic through its API.

Source: http://www.readwriteweb.com/cloud/2010/05/pen-api-madness-the-party-has.php