I'm using Facebook All mutual friends API to return number of all mutual friends (app-using and non-app-using) between a user and another one that is their friend.
However the All Mutual Friends API feature review requirements are very unclear and it looks like instructions are conflicting.
I have asked them in Facebook direct support and havent gotten a response in more than a week.
Here is feature review instructions:
This is app review instructions:
Does that mean the crosses next to common usage is allowed? But why are there crosses on the instructions whereas the ticked common usage is not even shown on app review
By the way this isn't asking for mutual friends permission, that doesnt need asking as its all users who use the app already.
If this appears for you, Wizkid above has answered for me.
Basically tick the OTHER box and then fill in your selection as based on the allowed use cases. Facebook is pretty quick to review and will generally get back to you within one business day.