Another way to word this might be "Platform with 8,000,000 monthly streamers/listeners pays less than platform of 1,000 subscribers to view pictures."

Think about it for a minute and it becomes pretty clear that shouldn't be surprising at all

You subscribe directly to someone on Onlyfans, you subscribe to Spotify as a whole and your listening habits help split the bill. If both are ~10 bucks a month of course one is going to make you more money than the other

Especially if they're a lesser known artist. Even if they're getting listened to, if the same people listen to 3x as much swift or whatever that will impact the lesser known persons earnings

This article is a dog shit way to bring attention to Spotifys issues, simple as