I don't really agree with this. There may not be a mathematically perfect solution to the problem of paying artists, but that doesn't preclude criticism. Apart from anything else, Spotify isn't trying to find the fairest approach, it's trying to leverage its market dominance to increase profitability and maintain market share.
edent|2 years ago
The cake-slicing algorithm beloved by parents of waring siblings is a good example. "I cut, you choose" isn't guaranteed to give a 50/50 split. But it incentivises the cutter to act with loss minimisation as their goal. And most kids can intuit how fair that is.
There are cake slicing algorithms for increasing numbers of participants. But they become increasingly harder to understand for people who aren't experts in game theory.
So you're left with the problem of what causes the least complaints rather than what is logically fair.