David, no disrespect but…. As you point out, Diane Greene is no slouch and would have offered Spotify incredible terms to get this as a case study. The reality is that Spotify could be paying zero but for Google, it would make no impact on the expenses side but with a massive upside in terms of referencability.
So the utility of your article is kind of debatable since Spotify could be paying anything from zero to… a metric shit ton(ne).
But, as I said, no disrespect intended…