I don't know how much Uber cost in Austin, but it seems like the base costs for calling a car are $4.50; I've gotten Uber rides for less than that in NYC, and the cost has been the prime reason to call them (I probably would have taken a bus otherwise).

I am very interested to see if aggressive pricing and cost/route optimisation can unlock enough demand to make pooling actually viable economically, which none of the Uber/Lyft alternatives really seem willing to try.