Don't you think you should... rephrase that? I believe the term is "negotiate a price", not "extort revenues".
I'm no fan of software patents or obvious patents, but if ever an invention deserved a patent, this is it.
I'm not suggesting that this is a story of greedy companies, or of greedy inventors. I believe the companies when they say that most people aren't willing to pay an additional 8% (for a tool that will probably last a lifetime) to hedge against amputation injuries. I just don't understand that, is all. Check out this abstract from some epidemiologists:
http://www.joem.org/pt/re/joem/abstract.00043764-199610000-0...
They sampled 283 amateur and pro woodworkers in New Mexico and report that "5% of all respondents suffered partial amputations." That is a really big fraction. Obviously, I'm unlikely to saw as much wood in my life as a professional carpenter, but it still seems like my odds of losing a finger as an amateur woodworker are probably far higher than one in 100,000. They might even be on the order of 1%. Which, to me, makes SawStop a no-brainer at $80. I want the miter saw and band saw versions, too.