Here is how I got $100 of driving credits toward my new Hertz on Demand account.
First when I applied I entered promo code "126SE1" which gave me $25 dollars of credit (had to call because it somehow didn't post to my account).
Then I figured I'd utilize the $75 credit promotion for turning in a competitors membership card - problem was I didn't have any.
So I found that I can get a free U Car Share account by entering coupon code "other" to waive the $25 registration fee.
But U Car Share doesn't provide you with a physical card, instead with a unique code. So I emailed Hertz and requested that they honor the promotion if I'd providing them with an email confirming the cancellation of my U Car Share membership.
First they replied that they've never received such a request and don't have a way of honoring it. And then, 10 minutes later, I got the following email:
"Dear Mr. Lev,
I apologize for the 1st response we sent. We have decided that we will be
able to honor the promotion for cardless competitors. You must send in
confirmation of their cancelled membership. An access card is preferred,
but if not available then an email or written letter from the car sharing
service confirming cancellation be required to receive the $75 credit."
I called U Car Share, cancelled my membership and asked the CSR to send me an email confirming this.
Go the email, sent it to Hertz and 10 days later I have $100 of driving credits in my account!