Hello,
on last saturday I made some tests because of it. Here my results:
1. It is not relevant how fast you transport the goods. If the passengers or the goods decide to use your vehikels (when you can transport them in less than 20 min), you will get the same price when they need 10 mins oder 15 mins to their destination.
2. You get more money when the distance are greater, but the money per distance get lower. (Example: For 10km you get 10k/km, for 20km you get only 8k per km…these are not the exact values, it’s only an example).
That were the results from my testing. I hope you know what I mean despite of my bad english.