Sure, but there's no reason it will always be the case. It makes sense to start with a limited number of hardware devices, and only ones under your control.
But the comment I replied to was concerned that some users of the service might have more disposable income than others, which is an odd thing to bring to the table when discussing a convenience service that has a $650 entry price (I don't have a smartphone, so I'm not being a ridiculous hypocrite describing it that way).
I'm pretty skeptical of price controls, I never expect them to do me any good. The argument presented there is that surge pricing is bad because some people can't afford it. The other side of the coin is that if you ban surge pricing, you make it more difficult to charge less at other times.