Apple has just announced the new official Twitter account for the App Store. Apple will use the Twitter account to promote new and exclusive App offers. The account isn't verified till now.
Welcome to App Store on Twitter! Follow us to discover new apps, get exclusive offers, and share with friends. #appstoreApple may promote discounts or distibute promo codes via giveaways on this new Twitter account, no one knows, but I think they will make good deals