Over the years, I used special rates for Mastercard holders, Avis members, and Hertz members most recently.
They gave a lower price and, sometimes, added flexibility.
Seems the Hertz rate I was using quite regularly has now been pulled. The only thing still working is a Mastercard rate for Middle East & Africa, which is of rather limited use to me.

I can't seem to find much info on current corporate rates (that do not require working for said company). Would be grateful for any tips (and I don't mean "book best flex" ).
Thank you.