Spotify will only be available in my ride during surge and with XL fares.The driver pays if the Uber Partner app is on their own phone. It's in the FAQ (see below).
Since this is normal quality, figure about one cent per minute of streaming based on a $10 per GB data plan (1 MB per minute at Spotify normal streaming rate).
FREQUENTLY ASKED QUESTIONS
I use my own device to run the Uber Partner App. How much data will music use?
If you use the Uber Partner app on an Uber-provided phone, the data will be covered by the subscription fee. If you use the Uber Partner app on your own device, the data for Music could be an additional cost. This integration uses the “normal” quality option for streaming. Learn more about Spotify’s data usage here. We’re working closely with wireless carriers to offer discounted or zero rated music data plans (much like the plans that are currently available to consumers). Partners currently have access to discounted phone plans with carriers like AT&T and Verizon, and we are in talks to expand these discounts in the coming months. Keep in mind that enabling rider music is optional.
No net $2.40 ride to me will be sucking my gig data account to boot, period.