My goal wasn't to give specific advice to people in certain situations. My examples are hypothetical; maybe I didn't make that clear.

Instead, the point of the article was to motivate you to go actually make sales, create value, and build relationships. None of these things require a developer. Do I know who you should specifically call to test the market in a given context? No; that's your problem to figure out. The point is that you CAN figure it out.