Huggie Bear wrote:...in all cases the creator has a product that could be of use to most people.
Not exactly the case. Sometimes the rewards have little or nothing to do with the project.
I understand the mindset that says I'm buying a product when I support a KS project. I tend to think that way myself.

But it's not strictly accurate. The real arrangement is that I'm pledging support for a concept, and the creator is rewarding me with something that may or may not be related to the concept. I try to remind myself of that whenever I get frustrated about reward fulfillment.