Dell Inc. said Friday that the company's promotions on popular social-networking site,Twitter, have brought in an estimated $3 million in revenue since 2007.

We’ve surpassed $2 million in revenue in terms of Dell Outlet sales, but we’re also seeing that it’s driving interest in new product as well, Stefanie Nelson wrote on the Dell corporate blog.

We’re seeing people come from @DellOutlet on Twitter into the site, and then ultimately decide to purchase a new system from elsewhere on

The computer manufacturer has been using the microblogging service to publicize deals at @DellOutlet since June 2007. The difference between Dell's strategy and many other Twitter users is that the company says it is making money with the service by sending out coupons, promote clearance events and announce new arrivals of products on its outlet site.

Twitter, on the other hand, is infamous for not having revenue or a business model as much as it is known for the messages its users broadcast to the world, known as Tweets.

However, put into proportion, Dell’s sales success is rather small at this time. Dell posted revenue of $12.3 billion for the first quarter of this year.