That is accurate. When they were paying the Apple tax, it forced them to raise the price of the premium membership when purchased through IAP. The Premium subscription through the App store was higher than the cost of Apple Music.
Yes. I'm pointing out it wasn't about marketshare.
I'm not sure that one data point is enough to make their argument invalid.
It's a pretty substantial data point. Clearly did nothing to increase their revenue, something of which they argued was important to address against Apple.