Apologies if I missed a previous thread on this, didn't have much luck on search...
Was looking up the T&Cs as some Caribbean/Latin American locations were previously eligible for free days, and I spotted something interesting:
https://www.nationalcar.com/content/...final_2017.pdf
Free Day(s) can only be used on National Car Rental Brand reservation requests at participating National Car brand rental locations in the U.S., Canada, Australia, the Latin American Caribbean (and, in Europe, for National Car rental brand reservations serviced by Enterprise).
I tried making reservations at SYD and LHR to double-check and sure enough, the free days applied to the totals.
Is this a recent change? If so, a huge ^ to National as this was something I missed after coming over from Hertz...