I think that the point behind this article is to start really, really small. If you decide to go big later, you have a profitable operation from which to scale.

I think that the point behind this article is to start really, really small. If you decide to go big later, you have a profitable operation from which to scale. But trying to start big from the outset might be too overwhelming for most people in terms of domain knowledge, financial resources, etc. Small businesses (that have an inherently scalable business model) are a logical stepping stone towards becoming a big company.