It's getting harder to get the drivers to accept rides in some situations. Recently, I watched some Uber driver accept my ride and then drag their heels to pick me up in the hope that I would cancel. They didn't like my destination.
This reminds me of the old Soviet union where the rates were fixed by some central committee. In order to get a cab to pick you up, you would hold up fingers that represented how much extra you would tip. The more fingers, the more likely the drivers would actually stop.