If scaling your product is ultimately dependent on having a large group of users, then you have a chicken and egg dilemma. The truly magical features we envisioned simply couldn't come to fruition until we had a dense network of users. We wanted to create such a vast reservoir of talent that a recruiter could say, I'm looking for an accountant based in Biloxi, Mississippi,. And I wouldn't be surprised if you could find that dream candidate in just one click. It took years of clever hacks and grunt work to enable that sort of high definition headhunting.