Sure, but he already spent probably ~500 hours. At $100/hour (assuming competent but not FANG dev in CA) that's $50k worth of labor. If he nets $200/months he w

Sure, but he already spent probably ~500 hours. At $100/hour (assuming competent but not FANG dev in CA) that's $50k worth of labor. If he nets $200/months he would need 250months ~ 20 years. My point is, if he did it for fun it's a success (he got a nice product, yay!), but it's not a financial success.