Real-revenue cases
A high school marketing teacher runs a part-time woodworking business selling wooden earrings, bookmarks, coasters and clocks, mostly through craft fairs and Etsy, grossing $15,000 last year while using the business as a live case study for his students.
01
It substitutes mass-produced cheap jewelry and generic gifts; buyers pay for handmade wood items with laser-engraved customization, and in-person fairs prove real demand. But revenue is heavily concentrated in fall, with January-March historically at zero, so it behaves like a seasonal side hustle rather than a stable business.
End consumers buy individual wooden jewelry and small home goods at street festivals and on Etsy; the founder makes everything himself and plows nearly all revenue back into tools and workshop.
Mass-produced cheap jewelry and generic holiday gifts
02
First made about 20 pairs of oak snowflake earrings as gifts for school colleagues, who told him to sell them; the January 2015 Etsy listing got zero traction, and the first real buyers came at an April 2015 street festival, where he sold $130 in one hour.
03
This is not an AI business, but two moves transfer: test demand with free samples before committing to production, and use real transactions as a product filter. For AI apps, that means validating retention with a small free-trial cohort before doubling down on a feature, rather than building features first and hunting for users later.
04
Revenue basis · Founder self-reported, unaudited (see source page)
The text gives both '$15,000 last year' and a page label of $2,500/month; the two don't reconcile, and both are founder self-reported and unaudited.
No customer acquisition cost, repeat-purchase rate, or split between Etsy and craft-fair revenue, so it's unclear which channel actually carries the business.
No actual profit after materials, tools and booth fees; the 65% gross margin comes from the platform's estimate, not the founder.