Thank you, makes sense. I was wrong that the per-user is simpler. Yet, it’s only fair. I wouldn’t buy a Rihanna album, in the old physical model, why would she

Thank you, makes sense. I was wrong that the per-user is simpler. Yet, it’s only fair. I wouldn’t buy a Rihanna album, in the old physical model, why would she get get my money in the new one? And it’s probably very likely they already have the userId -> songId logs for recommendations and such