A year ago, I used to make lots of mistakes in the earliest stage of idea development: especially dealing with details. This chapter reminded me of that, and I thought some people, probably beginners, might find it helpful along their way.
Some services (in context of web), these days, are not only free: they offer their users (and eventual contributors) a piece of their cake, too. Random examples are google (search + adsense), and scour (search + annotation).
I wonder where this is going to get: how strong will the "make money too" factor prove over "it gives me what I want" motivation?