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?
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?