Founder Playbook

Bootstrapping
I spent $5,000 on a golf course database — every hole, every tee box, GPS coordinates for the entire course. That forced me to get serious about monetisation because I had a real cost. And it made the product meaningfully better than anything free because nobody else was willing to make that investment.

A $5K data purchase was a forcing function and the feature unlock that changed everything

Buying proprietary course data served two purposes: it created a defensible data moat (competitors using free public data couldn't match the accuracy) and forced revenue discipline. With a real ongoing cost, Duffett had to charge enough to cover it — which in turn required building a genuinely better product. The constraint became a competitive advantage.


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Eric Duffett
Shot Pattern (golf GPS strategy app)High school teacher who built a golf GPS app as a side project; turned down $75K acquisition offer; reached $500K+ ARR working nights and weekends, paying himself $100K in 2024.
Sub Club by RevenueCat
Turning a Side Project into a Six-Figure Subscription Business – Eric Duffett, Shot Pattern· 15:40
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