Seriously if it is that good of an idea, tell no one, burn it as much as you can for as long as you can.
You think you're being as discreet as possible...How can you guarantee that one of the 3 people you share the secret with won't tell his cousin, who tells her coworker, and soon enough NPR is doing a report on it?
As much as I would love to know your secret, keep it to yourself. I've done the same with mine, and hope to keep using them as much as possible. I'm often tempted to share it with those who have helped me out of a jam, but again, there is no guarantee that 6 months from now I won't be shut down because of that.
Treat it like a treasure map, why would you share a map to buried treasure with anyone only to have one-eye'd willie steal it from you...