"I read this as ‘here is your reward for paying for all your rentals in the last 20 years. We are giving you 6 month to use those points’."

This! An awful way to treat customers who built up sizable balances. So frustrating. And grossly unfair too -- points built up over more than a decade, for extended leisure travel. I wonder if any AG's would be interested? Unlike airlines and frequent flier programs, Hertz is 100% subject to state law including state consumer protection law.