I fully support you on your's previous comment but here I need to remind you what it is you who understand the implication of that query. Regular Joe isn't. And even more importantly is what the vendor is not on R.J. side, it is on the advertising side[0] where the excessive knowledge about a user is the thing.

Like just 15 minuts ago I opened Untappd likr a bazillion times before and were present with 15 screens of toggles and like 250 entities at least. There were at least 10 permissions to give the consent to track the things I do outside the app.

So not only a detailed reason for the permission wouldn't work, it wouldn't be implemented in the first place,