This seems like excellent advice. I've got a heuristic for finding when you're not doing this: when you say "we'll make our product free for now, but we'll cha

This seems like excellent advice. I've got a heuristic for finding when you're not doing this: when you say "we'll make our product free for now, but we'll charge for premium features later, when we have some that people would be willing to pay for." That seems to be less common now than a few years ago, but I've encountered it a lot. It's a good sign that you don't think the core is valuable.