A founder leans back from his laptop and watches the spreadsheet fill in. Thousands of colleges. Every one a customer. The revenue line climbs and climbs. It's the most beautiful thing he's ever built… and almost none of it is real.

What happens when you finally run the numbers and watch your dream market collapse to a fraction of its size? For most founders that moment feels like failure. It might be the best thing that ever happens to them.

In Episode 11 of Starting Up, host Jay Sensi goes past the spreadsheet and into the gut-punch reality of watching your market shrink. Building on the TAM, SAM, and SOM framework, Jay tells the story of how his "5,000 customers" became 2,000, why he refused to lie to himself about it, and how a smaller, sharper market became the single biggest advantage of his entire career.

Every founder ov ...