This is something not many places offer but Singapore does. You can get unlimited travel for quite cheap vs using something like Uber. I believe they have Grab in Singapore. Either way, is this worth it for getting around, or is it better to just pay as you need to travel?
I think it is just for the simple fact that you only have to worry about paying once. It is less money you need to carry and less hassle you need to be concerned with. It gives you more time to enjoy your stay.