From NY Times article on Skype’s new unlimited calling plan:
Over all, the Internet calling business is booming. Mr. Halpern said that by the end of the third quarter, there were around 8 million subscribers to Internet calling plans in the United States, up from 6.5 million in the previous quarter. That figure did not include users of Skype.
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In the third quarter . . . Skype generated $50 million in revenue, a mere 3 percent of eBay