I custom designed the machinery for this, and as a mechanical engineer you have my word that these switches are being broken in on precision machines, and not some silly "rock taped to a fan" device. This helps keep the stresses on the leaves to a minimum, as the pressing is no harsher than your fingers. The machine also introduces extremely slight oblique presses, as we never have perfectly centered and straight down presses when we type. This helps to wear the switches evenly and effectively.
Sales on worked in switches are final, as this is a product with a service rendered upon it.