I submitted a reservation to be tracked this morning, which was made with Advantage. I got an email about an hour later that there was a $10-cheaper rate with Hertz, which I was able to book through Autoslash.

I can't find this rate anywhere else - what are the chances of this being booked with some sort of corporate code that I don't actually qualify for, or what are the chances of Hertz not honoring the reservation price?