No, must admit I haven't I'm afraid even tried - I didn't pay attention to location with my response, apologies

That means you might be stuck with a partner like Hertz crediting a rental, or a (bit of a waste) transfer of airline miles - but really its not needed anyway, those points are safe for a while yet. Alternatively signing up for the credit card would also work

Don't know if anyone else can think of any small earning possibilities in Europe, must admit this problem hadn't occured to me as I have the visa card in case I was ever in this situation.