Have you heard about the razor-blade strategy (also called, according to Wikipedia, the "bait and hook model" )? The idea is that a company sells you a razor for next to nothing -- or gives it away for free. Great deal, right? You get the razor, and the manufacturer gets to sell you high-cost razor blades for the next few years (or, at least, for as long as you use the razor), making a lot more ...

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