I have heard that the careem captain can have his last ride near his home. So as soon as I am done with my job I can choose the last ride option and pick up a ride that is has a destination near my home.
I know I am not going to get a ride everyday. Probably 1 or 2 rides every 5 working days.
Since my office is in a highly commercial zone. There is high probability of getting a ride.
And about fuel charges. I don't expect to make cash more than the fuel cost of not more. Atleast I can get something.
My point of registering myself in careem/uber is generally to atleast minimise the affect of fuel cost on my pocket.
Hope this helps.