In message , at 15:05:49 on Wed, 17 Aug
2016, tim... remarked:

With Uber, you have to have an account, before you can use it at all.
Cash isn't an option, and nor can you just order an Uber car without
first setting up an account.

You might just as well argue that there's a deterrent to using the
Dartford crossing as you (almost) can't pay for that without setting up
an account

If I can chip in here, yes that is deterrent. I've avoided it ever
since. On the other hand I used the M6 toll for the first time a couple
of months ago, and all you have to do is lean out of the car and use any
old contactless credit card.
--
Roland Perry