Not everyone wants to start a company so they can sell it for $100M in three years.
Some people are happy to have a one-man operation that generates $60k in annual revenue, requires less than forty hours a week of maintenance, and lets them work from anywhere in the world.
I’ve heard these kinds of businesses referred to as “solopreneurship,” “micropreneurship,” “microISV” (specifically for software), “lifestyle businesses” (often the pejorative VC term), and “profitable businesses.”
Recently I’ve found a couple of podcasts that have a ton of information on these things, and they’re quite fascinating. I’ve been able to learn a lot about online marketing and product creation just by tuning in during my daily commute or jog. (Fair warning: These podcasts are aimed more at programmers looking to launch startups, so if you don’t know much about software, they may not be your cup of tea.)