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The Ugly Truth About Spotify Is Finally Revealed
(www.honest-broker.com)
This is a most excellent place for technology news and articles.
the german tv channel ARD actually published a three-part investigation into Spotify and Eventim middle of 2023 where they spotlighted this issue as well. it's a great watch if you understand german!
it's called Dirty Little Secrets
EDIT: here's episode two, the relevant one where they investigate what they call "ghost musicians"