It's quite probable if someone is manually entering ratings on hundreds of phones, that the owner of the phones is not the same person doing the labor.
Is there a reason that you think she, in particular, would make money using a synth app on those phones, versus anyone else?
If she doesn't own them she should consider asking her boss if she can open for Melt Banana sometime.
What would happen if you used each phone to call another phone on the rack and then put them all on speaker phone? The feedback would be fascinating.
What if you created a FaceTime array in which each phone connected to an audience member's phone? You could then place tone emitters throughout the venue and the physical placement of each participant would shape a chord assembled on stage.
So much room for creativity beyond the creative grey market businessman's greed. That was the point of my post.
There's room for how many app store ratings companies/employees? With a reasonably stable income, too. There's room for how many iPhone feedback musicians?
In fact, what you're suggesting may have already happened. Boss took a set of iPhones, then ran a band. And then bought more iPhones to grow his ratings business. So the image you see would be the same, regardless.
Is there a reason that you think she, in particular, would make money using a synth app on those phones, versus anyone else?