Quite right. And you are now qualified to teach economics to communists (who still believe in the "labor value" BS). That's what the mean old "free market" is good at: giving people an incentive to PLEASE other people. If they don't like what you're producing, they give you nothing. It's an almost immediate "correction mechanism," so that even the most greedy, selfish bastard (NOT talking about you here), in a free society, can only enrich HIMSELF by enriching OTHERS. And that's a beautiful thing.