Hmmm, you need 12 rentals (of 2 or more days) or 35 rental days in a calendar year to even begin to start earning the free rental days.

Wow - this program is wholly uncompetitive with Hertz/National.

And 50-75 airline miles per rental day (or 1-2 miles per dollar) depending on program is borderline worthless. Barely more than you get on a credit card.