A lot of us use our corporate CDPs, which I believe are supposed to be used only by employees or people associated in some way with the particular corporation. Not a good idea to publish those on a BB, IMO.
The corporate CDP associated with my Hertz #1 Gold account gives me LDW included (no extra charge) in all rentals. That is a valuable benefit, and is one of the reasons I use Hertz more often than other rental companies. (However, I don't rent cars very often when I travel.) That, and the Gold service is generally superior to the service at other companies; and I find the rates to be competitive as well, especially when I use Hertz promos to knock something off the rate.