I remember seeing off a rental travel van a few miles from LAX. They were a tiny business and had no shuttle service. Next door was a EUROPCAR rental and outside it a bunch of taxis and Ubers. They ALL refused to take me, and EUROPCAR security didn't want me catching their shuttle bus because I want a customer. I had to conspicuously beg them to let me on the bus in front of customers in the service area to not miss my flight.