All Things D writes, Throughout Twitter’s infancy, the company had a loose philosophy toward its APIs. In the quest for a user base, developers were welcome to do much anything they wanted in integrating with Twitter, which often mean creating spin-offs that muddied Twitter’s original intended experience. Six years later, Twitter has grown up. And as the 140-million-plus user service continues to expand to reach main stream audiences, Twitter knows it needs to assert and define itself more than ever. Which is why when it was announced on Friday that Twitter had ended its tweet syndication partnership...