Before streaming flattened everything into an endless queue, the B-side was music's pressure valve — the place where artists buried experiments, jokes, and half-finished ideas they didn't think the world was ready for. Except the world was ready, and those throwaways became cult obsessions, genre blueprints, and sometimes the most important thing an artist ever recorded. We're cracking open the hidden economy of the B-side: who buried gold there, who got lucky, and what it tells us about how the music industry accidentally funded its own revolution.