You want to really solve your problem totally easily and legally and legitimately? Become a member of ENTERTAINMENT, by buying an ENTERTAINMENT coupon book for the area you live in. Right now, they are offering all books at the discounted rate of $15 per book, which is 50% off.
What does that give you for Avis you ask? Well, the discount code for ENTERTAINMENT gives you 40% off on many, or maybe even most, Avis multiple day rentals at Avis corporate locations. I happen to be one of those people who is entitled to use the K444404 code, and I am also a member of ENTERTAINMENT, and I am renting an Avis car for a three day rental as we speak.
Believe it or not, the ENTERTAINMENT rate beat the K444404 code by more than $2 (in this instance) for the same rental period that I am on now, AND, I still got my Chairman's Club upgrade to a luxury car! My rate is only $66.15 (40% discount), plus taxes and fees, unlimited miles, Thursday to Sunday, at ATL, using the ENTERTAINMENT BOOK AWD code that I am entitled to use as a paying member of ENTERTAINMENT. If I would have used K444404, the rate would have been $68.36 (38% discount), and if I would have not used either rate, the best that I could have gotten would have been $93.71 (15% discounted, from the undiscounted rate of $110.25 at $36.75 per day), for a mid-size, with my Chairman's upgrade to luxury. 'Nuff said?
Of course, different locations, different dates, and different lengths of rental will change the factors, but still, the numbers are striking! As always, YMMV!