Well, to be fair, the folks over at MotorCity Marauders did a lot of legwork to even make the certificates possible. Ford was not asked about the moonroof option, so it wasn't included.
So the nice people/enthusiasts who organized and made those certificates possible were human. It wasn't Ford.
But I have one of the Silver/Light Flint/Moonroof and I also heard about the 170 number.