Hi Sayari. They really do! Here are more details on the 50% refund on Udacity’s support page.
The DAND helped me get a part-time job as a data consultant with a startup. I don’t have any anecdotal experience with companies with larger HR departments yet, though I will in a few months and will be writing about that experience. There are job success stories on the DAND webpage. The program definitely introduces the requisite skills.