On: Uber said to use “sophisticated” software to defra...

[sidlls]

This isn't a "spread." This is Uber charging the passenger one fare and paying the driver as if the passenger paid a smaller fare, without telling the driver or the rider that it is doing that. It's more like a broker quoting two different spreads to either end of a transaction and skimming off the top.

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But see above. What I pay the driver has no direct relationship to what I charge the rider (or vice versa). The financial metaphor breaks down here.

They correlate, sure: both formulas include miles and time (or estimates thereof). But they're not bound nor guaranteed to move in lockstep.

That drivers (or riders) thought they did is not a legal argument. (Unless they were led to believe false information by Uber itself.)

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That drivers thought they did is a legal argument if a reasonable person would think that.