Downloads of the app have thus far not been substantial; it has not charted highly on mobile download stores. Still, while Schlogel declines to give out subscriber numbers, she says “We’re definitely happy with the traction we’re seeing.”
For the amount of power, celebrity, and attention this thing has gotten, a week was more than enough time for this to blow up. I wouldn't be surprised if it gave Spotify a boost because of all the free press.