Ask HN: Successful one-person non-SaaS online businesses?

The question about successful online business has been asked a few times in HN (https://news.ycombinator.com/item?id=21332072, https://news.ycombinator.com/item?id=13326535) I'm curious about non-SaaS business models because nowadays with all the press that SaaS gets other viable business are not heard about often. > How many people on hacker news are running successful non-SaaS online businesses on their own? What is your business and how did you get started? > Defining successful as a profitable business which provides the majority of the owners income.