From the website:

We dream of an independent company devoted to nothing but your priceless photos. A company that backs up your photos to three data centers across the U.S. A profitable, debt-free company. That earns your fanatical loyalty. We're living that dream.

23 employees. 315,000 paying customers. 175,000,000 photos. We'll always be smaller than the photo-sharing divisions of giant companies. Which is a very good thing.