I received an email 2 weeks ago after my 20th rental this year offering me a free valet return from Hertz to the airport on an upcoming rental. The fine print noted that it was subject to avaialbility, that advance reservations were required and that it had to be redeemed within 90 days.

Today I attempted to redeem but clicking on the link takes me to a page that says the offer has expired. That's strange - I thought I had 90 days? Any ideas?