Hi jamito,
Thanks.
I had a look - for Kuta to Uluwatu and back I was charged IDR 190,000. 50kms. 2.5 hrs. All figures rounded up. Plus IDR 50,000 cash tip to driver. In the breakdown I can see base fare, distance, time and distance surcharge. The time component Which I assume included the 1hr waiting time at Uluwatu was 60,000 IDR.
On The way the driver did say there was traffic and so he had to detour. May or may not have been true, how would I know.

For my airport uber - no tolls in the breakdown.

had I refused to tip the driver the 50,000, he would likely have left me in Uluwatu and at the mercy of the Uluwatu taxi mafia. Any suggestions on what would be a good course of action under these circumstance? I guess I could have negotiated on the tip but at the end of the day it was AUD$5.....