For over a decade, I’ve been developing and selling a standalone PHP QR code generator on Envato. Over the years it found its way to more than 1,800 customers, and with that many people using it, the feedback never really stopped coming. Most of it converged on one question: “How do I monetize this?”. People wanted to turn the generator into a service — sell access to it, charge for QR generation, run it as a business. A smaller group asked something more specific: “How do I integrate this...