There are people who have learnt how to monetize Twitter.

Reality TV star Kim Kardashian, with almost 3 million followers, gets $10,000 per tweet, while business blogger Guy Kawasaki fetches $900 per tweet to his 200,000 fans, according to Business Week. (See a list of largest publishers at Ad.ly.)

Beverly Hills-based ad network Ad.ly has signed up 20,000 Twitter users who get paid for placing ads in their tweets. 

Last week, Twitter's 50 million users posted 8 billion tweets, according to research firm Synopsos. 

Google and Microsoft are paying $15 million and $10 million, respectively, to crawl Twitter. 

In other words, many organizations are experimenting how to extract value and money while using Twitter micro-blogging service.