Twitter, surprisingly, never used to natively support images back in 2008 and so a new service was born: Twitpic. Various popular third-party Twitter clients supported Twitpic and it was used by thousands, but Twitter eventually added photo sharing to its service and it was clear services like Twitpic and Yfrog weren’t going to last forever. Twitpic is now shutting down on September 25th, but not because it couldn’t compete with Twitter’s own image service — because Twitter is killing it dead.