I ran into this recently on a flight that arrived much later than it was scheduled. The airport was busy from several flights arriving at once, and uber / lyft

I ran into this recently on a flight that arrived much later than it was scheduled. The airport was busy from several flights arriving at once, and uber / lyft surge prices were insane. It was too late for a bus, so I wandered over to the taxi stand. No one was working there, but a few minutes later a few cards started showing up, and I ended up getting in one. What was weird is that all of the "taxis" were regular cars with magnetic "taxi" labels on them, and at the end of the ride, my driver charged me on a square terminal, with no option / chance to tip. I honestly don't know if it was just some enterprising person that showed up at the airport, or what the heck happened.