Dont forget, there are other ways to earn free days.
Here's the breakdown of the program:
A) Each qualifying rental earns 300 points.
B) A free day is earned with 600 points.
C) Other ways to earn points, here's some of the ones from last years promo:
1] You are able to get 75 points (can be earned x4) for making a rental using the mobile app.
2] 250 points for pre-paying gas (x1)
3] 250 points for renting from a neighborhood location (x1).
Regular free days (not the ones from the special promo) expire on December 31 of the year following the year in which they were earned.
PSA - If you are buying a free day from someone make sure you are an emerald member.
Without this they won't allow you to use the coupon.