I'm not switching the definition of decent. I'm noting what the actual effect of Spotify's business model and operations are. If you find it decent a user, and are OK with the long term impact, go ahead and use it. People just need to be reminded from time to time that their individual choices (as "users") have ramifications beyond whether they get decent service.
Also, as a side note: HN is a generally US-centric (and more broadly anglophone) context. The word "decent" in english currently has some related but not trivial to distinguish meanings. There's a British english version (now spreading into American english, certainly among younger cohorts) which equates roughly to "quality". There's also a version that is more related to some sense of morality. A "decent person" isn't so much about what they will do, as what they won't. There's the version used in the question "Are you decent?", asked before entering a room. This is partly why I asked what the OP meant.
Also, as a side note: HN is a generally US-centric (and more broadly anglophone) context. The word "decent" in english currently has some related but not trivial to distinguish meanings. There's a British english version (now spreading into American english, certainly among younger cohorts) which equates roughly to "quality". There's also a version that is more related to some sense of morality. A "decent person" isn't so much about what they will do, as what they won't. There's the version used in the question "Are you decent?", asked before entering a room. This is partly why I asked what the OP meant.