"prohibiting future uploads while redirecting the audience towards comparable programming that was more economical for Spotify" — this sounds like Spotify generating the white noise on device or partnering with an app that does so, which seems like a much better use of resources then letting users upload thousands of GB of machine generated audio per week streamed to hundreds of thousands of viewers. I don't think there's much indication at all that the goal is stopping people from listening to white noise and forcing them to listen to other podcasts. And i don't necessarily think they'd be wrong in assessing that this is a very poor use of bandwidth costs, or wrong in thinking that it's one that significantly changed the marginal economics of the platform (auto generated white noise can be uploaded in bulk by computers with no human involvement compared to the time it takes to create even the most bare bones podcast episode, and one "episode" of white noise is indistinguishable from a another for most users, leaving Spotify holding the bag for thousands of hours of back catalog that may never get listened to)