We are not talking about Rickshaws on the prom. We are talking about them on the roads around Calis in the Tourist Season to take visitors up and down.
However, I would not see a problem with them on the prom. They did not cause a problem a few years ago, they ran very successfully and were extremely popular, as other members have stated. So, obviously the guys running them must have had some sort of permission to do so.
They would be no more of a problem than the bikes, scooters, motor bikes (including the police bikes) and now the latest things Segways, that are regulars up and down the prom.