I listen to say 1,000 songs a month on Spotify, at $10 a month royalties that’s 1c per song. If I listen to song K 10 times I would think they’d get 10c from me, but they don’t neccersarilly - it might be 1c, it might be $1.
There’s a sad effect - if I listen to 2 hours of Band A and 3 hours of Band B, but Band A has an average track length of 2m and Band B has a length of 4m, Band A would get more than Band B!