You can't see the map now, but I don't think it was all that small. It's supposed that helmet laws were a big factor in it's failure. Helmet laws depress cycling rates in general, and defeats the spontaneous convenience of bike share, which is much of its appeal. The only only other extensive bike share system that hasn't gained traction is Melbourne, which also has a helmet law. News articles also cited hilly terrain as a factor. But AFAIK, bike share is successful in San Francisco, so are hills really the issue?