Code A191009 does wonders for my reservation at FCA (Glacier) for 8/12 -8/19. It lowers the final cost from $416.76 to $222.54 for a midsize car. And strangely (to me at least) changing the last digit(s) of that code to 08, 07, 06, 05, 10, 20, 30 etc., still produce the same great results. Could any of those altered codes allow public use?