Cohen's advice is good for two reasons: 1) Obviously you see if there's any demand for your product but perhaps more importantly ... 2) It forces developers t

Cohen's advice is good for two reasons: 1) Obviously you see if there's any demand for your product but perhaps more importantly ... 2) It forces developers to put on their salesperson hat. Lots of us developers just like building products and just willfully ignore the other part - selling the darn things!