At Chirp, Twitter’s first ever developer conference, co-founders Evan Williams and Biz Stone finally revealed some key statistics about the company.

  • 105,779,710 registered users. This is the number everyone was waiting for. Previous guestimates had put Twitter users in the range of 60m. But the revelation that Twitter now has more than 100m users is big news for a company founded just three years ago. Sceptics who doubted that Twitter was catching on can put those fears to rest. Twitter did not, however, disclose the number of active users it has. That number is likely much smaller.
  • 300,000 new users per day. That works out to about 10m new users a month, which could put Twitter on pace to double in size this year. It’s not quite as fast as Facebook is growing, but Twitter has escaped earth orbit.

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Twitter has unveiled its long-awaited monetisation plans. Through a programme called Promoted Tweets, the company will allow businesses to bid on keywords, similar to Google’s highly successful AdWords system.

Twitter gave details to the New York Times and AdAge, which posted their stories late on Monday night San Francisco time.

According to those reports, the system will allow advertisers to bid on keywords on a CPM basis. When a user searches for a term on, one ad will show up at the top of the stream and be identified as a “promoted” tweet. Initial advertisers include Starbucks, Virgin America and Best Buy. Read more