Do you have info, anecdotal or otherwise, on how much you think you save per ride in total and relative amounts? That might sound like a lot, but really I'm just wondering if you can estimate "I think I save about $X dollars on a fare that would cost $Y dollars otherwise."
By leaving the app before booking, I often get 10%-20% off (it claims rates went low, of course it's just a retention discount), not sure about others.
