You cannot get away with suspicious trips, the computer will detect it. And it's not wise to hold on to one trip to get hourly incentives you ate only saving your fuel cost for hardly 400-500. The more no Of trips the more it is fruitful...
And if any uber partner picks up a client on bike, the rider himself has the authority to register a complaint against that particular trip ID, uber takes prompt action in regards...
Last but not least, one can earn through dishonest means like this but these extra bucks will be taken away from you one way or the other ( natural phenomenon ) . 
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