I got asked to sign a NDA yesterday. It is something people ask about a lot, and something I always refuse to sign.
Ideas are cheap (my going rate is probably $1 per idea), turning an idea into a successful feature/product/business is the hard part.
“If there were an efficient market, I could simply “sell” my idea to whoever wanted to buy it for “fair market value” (lets say $1,000). Right now, the simple cost of figuring out what the idea might be worth is likely more than the idea itself. This is a clear case of the transaction costs exceeding the cost of the item.”