One of the main developers of the Yahoo weather app is a gigster (developer on the platform). The statement is that it was built by "one of our gigsters" and is intended to showcase the quality of work developers on Gigster have done. Had that developer been on Odesk or TapFame they would have listed Yahoo Weather as part of their portfolio. In this case they actually do list it as part of their portfolio. Definitely do not intend to take away from your hard work and appreciate you for it. Happy to do better in making this clearer but it's a bit unfair to imply that we cant showcase the work of developers on our platform as an indicator of developer quality.
Sorry, I agree with the OP. I interpreted the "Success Stories" page, especially when it is sub-titled "Our prior work speaks for itself" as referring to the work performed through Gigstar. There is a difference between allowing somebody to claim work they performed versus assigning that claim to the body that employs them after the fact. This example, just because of the lack of clarity, presents itself as the latter which is a little unfair in itself.