This is helpful advice for how to treat your first few users. As for where to find them, the advice is "don't worry if this method won't scale" and "identify a core/goal user group". What I hoped to learn, and expected to find with this article title, is: how to identify this core group, and how to reach them?
(The Quibb example seems to explain how she made sure the early users would enjoy it, but not how she identified or found them.)