SCAM!. There is a strategy behind their revenue model. They lure you with low rents but try to cheat you out of money in all kinds of ways. 1 time when returning the car (Lisbon) tell them that everything is ok, but still mention any damage in the intake documents. Impossible to undo. So pay! Other times I received a car (Faro) that was completely full of damage. Not a problem in itself. On return they found a miniscule damage that I would have made. Pre-conceived strategy. So also pay. Always take pictures and video of the car you get. I suspect that if no photos are taken, they will take this into account (misuse) when returning the car