'I started Microsoft as a weekend project and now it's making 1B/mo'
'I started Apple as a weekend project and now it's making 1B/mo'
'I started Google as a weekend project and now it's making 1B/mo'
How the company was started is completely irrelevant to the outcome and it's clearly an 'entreporn' clickbait title. Gumroad raised millions to get started and it took 7 years to get to the point where they are now. And 350k/mo in revenue doesn't even mean that they are profitable.
If you are an (aspiring) entrepreneur, don't compare yourself to the typical story posted on IH.