I'm having trouble envisioning very many markets where a "fan" is going to consistently spend $1k/year. The article mentions professional training and education, which makes sense. I can also see certain people spending that kind of money on physical goods (mechanical keyboards, audiophile equipment, one-of-a-kind art pieces) but $1k of revenue from physical goods is very different from $1k of income . Other than tha…
You can sell software development services, and your fan may be a graphic designer who uses you every time to build out the back-end for the beautiful designs they make. You do a good job, you're their go-to person, they are your "fan".