"In the current terms of service, Twitpic reserves the right to reuse the images that users publish via the service." - and even commercially, and TwitPic has already secured the partner with WENN. via Twitter-Bilder: Verwirrung um Twitpic - Golem.de. This is therefore another service that is better not to use, as of course the creator of the images does not receive any money for the use.