^^
ubm
In the digital world, you can't download an app or register without checking the box that you agree to the terms and conditions for an apps use.
Specific to OP's questions about use specific apps, I suggest referencing the apps terms and conditions and registered users info.
In this case, Strava did not refuse to provide the users information and/or respond to the subpoena but they are also guided by their own established, cited limitations and protections.
In Stava's Disclaimer of Warranties and Liabilities, they define their product is provided for use "AS IS" AND WITHOUT WARRANTY...
Their software application is also made available for use as long as you accept the proprietary rights and agree to them. When users check the box, Strava is under no obligation to provide a techie to give testimony that could reveal proprietary information, their single, prized asset!
www.strava.com
ETA: I've been following a 2018 family murder in NJ that's been held up for 5 years over proprietary DNA testing that the prosecution wants to present but the defense wants the code info to study it.
That's essentially what KA's defense was asking too. Give us the deets so we can criticize and discredit the information.
Keith Caneiro, his wife and two young children were murdered in 2018. His brother, Paul Caneiro, is still awaiting trial in the killings.
www.app.com