Same thing happen to me in Feb.
At FLL airport, terminal 1, I was asked if we needed a taxi. I was pointed to a large black SUV. I asked driver if he was a taxi driver as I did not see a taxi sign on it. He waved a plastic card around his neck at me. I sat in the front seat. As we were driving, I did not see any meter. I asked him about the meter, his answer was it is all on an app on his phone.
We were going to Hyatt Place, on 10th Ave, a popular hotel with cruisers. He did not know where it was even with goggle. We finally made it there. We were charged $35. Before, I have paid $30 for a taxi to a beach hotel. I mentioned at check in about the price of the taxi and they said it should not have been that much.
I think he was not a taxi but share ride.