[dinkelberg]

Clickbait title. He didn't invent OnlyFans. He created a similar site which failed.

[gpjt]

I think the punctuation makes it clear -- imagine "How I invented Facebook. In 2001." The full stop in the middle of the sentence breaks it and makes you realise he's speaking figuratively.

[alsetmusic]

If the comma was strictly a pause for effect, sure. But it's grammatically correct and I wouldn't have ever read it the way you suggested.