Maybe that's what your read, but you could also read that Lady Gaga has more income from iTunes just because more copies were sold there. And ofcourse this has

Maybe that's what your read, but you could also read that Lady Gaga has more income from iTunes just because more copies were sold there. And ofcourse this has nothing to do with Spotify. They just have a contract with the labels. How labels distribute income is up to the labels.