If tweens listen to 10 hrs/day of Justin Bieber on repeat using free accounts, Bieber shouldn't get money from adults who listen a few hours a day to anything but him using premium accounts.
I think it's quite reasonable to assume that differences in listening and paying habits between users would NOT average out, and a per user split would be fairer.
I think it's quite reasonable to assume that differences in listening and paying habits between users would NOT average out, and a per user split would be fairer.