I saw this and thought, finally, points from my rental car company.
Downside: It appears you can not double dip. It is either the points or the normal free days, not both. I am not sure about the 1-2-Free promotion which is different from the normal free rental days. Plus it adds on $1 per day, max $5 fee for the points.
And, lest we forget, usually only the first 600 are CPQP.
I tested the code on a sample rental, and it was $6 higher than my typical assigned code on a weekly rental.