I'm currently listening to The Spotify Play: How CEO and Founder Daniel Ek Beat Apple, Google, and Amazon in the Race for Audio Dominance by Sven Carlsson and Jonas Leijonhufvud $SPOT and the book speaks of multiple boycotts way before Joe Rogan and Neil Young
Artist like Jay Z, Beyonce, Taylor Swift, Dr Dre, and many others. But you know who also came back to Spotify after some time? Jay Z, Beyonce, Taylor Swift, etc. Most that would "quit" Spotify would later come back.
I understand that in the future it doesn't mean it will keep on happening but the fact that every time some famous celebrity "quits" Spotify and stock drops should not be a real bear case against $SPOT
Another point that after every boycott the number of subscribers would not really go down at all or by much shows that majority of people stick by Spotify.