Agree, the job for car is limited, and get grab away quite fast. But not easy to do also with car. Expected heavy load as car max load allowable 20kg,if the location with high parking fare, then good luck, you won't park nearby with cheaper fee then walk all the way with the load.
Yes, can forget about the incentive with car, looking at the traffic condition nowaday, always jam without any reason, at least 1 hour for the nearest job including looking for parking, look for customer, load goods, drive, look for parking, unload and look for receiver. Then you need to pray for job near to current place.
By the way is the sticker program still available for car?
For job wise still reasonable available for bike. For car not much, maybe they have made some announcement to customer, can see more car job with earlier booking, so you can plan a bit.