Dun worry about the Promo codes, whatever it is, makes sure your bank particulars are correct.

Maximize profits? Just be hard and smart working, and if that place is really cold, try doing Uber as well. Grab and Uber customers area sometimes different.
Always call riders who are far to pick up to comfirm they are there and you dun have to have an acceptance rate of 100% everytime. Know when is peak time and be there.
For you, make sure the car is well maintained, tire pressure is Ok, and you dun have to ON the aircon all the time. Half of the time I'm alone in the car, i Off the aircon. I even open the bonnet a bit to release hot air from the engine bay the whole day.
Later stage, you will learn how to deal with customers for long distance journey, get Open Jobs thats outside of Grab/Uber.
Thats just some tips, there is more.. Of course

This post has been edited by azbro: Aug 26 2017, 08:17 PM