Cai Li and Robi started Airfrov in 2014 as a social enterprise to sell crowdsourced eco-friendly t-shirts. They made mistakes by building an app before validating customers, making excuses for not having a product, and not knowing what data to collect from customers. After getting feedback from investors that they needed customers and a minimum viable product, they focused on understanding customer problems and building profiles to sketch user stories. They then prioritized features based on user value, business value, and technical complexity. Cultural values like decision making and output were also important. Now Cai Li uses code to offer $10 credits on Airfrov to thank customers.