First, you need to understand Uber owns no vehicles and rely on partners / Drivers to fulfill trips. Now Partners / Drivers are also in it for the money so the whole arrangement has to pay everybody i.e (Uber, Partner, and drivers). Now Uber announces a price cut to drive more people to use Uber so they can get more of rides and more "25%" on each ride, but the didn't consider the other two parties in the trio.
So they are squeezing revenues from Drivers and Partners but are unwilling to reduce their own cuts on the fees. Taxify is able to have low prices because they charge 15% commission on fees.
Uber went into this with an aim of out pricing Taxify but the irony is that it has hurt Uber more than anyone else.