Problem is, "big for one person" is not big enough to be news, relative to all the companies. Once they get big enough for many to hear about them, they have to grown, to handle it. e.g. Notch (Minecraft)

Secondly, the best way to make solid, reliable money is to have a niche, without competition. So, you keep your mouth shut.

You'll probably most likely notice them in small, industry-oriented niches. Or... after they grow larter than one-person.

To give an answer: https://balsamiq.com/products/mockups/