Also see Twitter’s fear of making hard decisions is killing it (The Verge)
"After years of warnings and several delays, Twitter finally made good today on its promise to kill off key features of popular streaming apps. In a blog post today, Twitter said it would remove access to APIs needed to power push notifications and an auto-refreshing timeline. Rob Johnson, a director of product, said Twitter would stop supporting those APIs so it could focus on its own native applications.Twitter officially kills off key features in third-party apps -- The Verge
The changes affect popular third-party Twitter apps including Tweetbot, Twitterrific, Talon, and Tweetings. As Johnson wrote in a separate note to the company, third-party apps invented many features that were later adopted by the company in its native apps.
“Third-party clients have had a notable impact on the Twitter service and the products we build,” he wrote. “Independent developers built the first Twitter client for Mac and the first native app for iPhone. These clients pioneered product features we all know and love about Twitter, like mute, the pull-to-refresh gesture, and more.”"