This clever member of the noteworthy travel-hacking forum FlyerTalk has posted about his recent trip to Funchal (Madeira, Portugal). TL;DR: He successfully exploited this promotion to earn 185,000 “miles”!
Interestingly, I once visited there, albeit under different circumstances.
Two weeks before my trip, Avis Funchal called me. A man explained that there had been an error in the system, and that 18 bookings had been created in my name.
I told him that there must indeed be an error, because it’s supposed to be 37. After typing a bit at his computer, he told me that this was nonsense, and that he would combine all the rentals into one. I explained about the promotion and that I would really appreciate 37 individual rentals.
He seemed to understand, but ended the conversation by saying “you will pay for this”, so it was unclear if he was onboard with it or not.