@givemeawhisky i too facing the same issue.
As per the link:
- The PrivateMembersData collection has the following permissions:
Read: Site member author
Create: None
Update: None
Delete: None
I am having a page , as a winner dash board, where i need to show the pictures of the site members.As the page is a public one , the images are not displaying properly. Only the author can see his image and rest everything is blank.I have used the default Sign up option including the social media login for my site. So almost all the contacts are having profile pic. Can you just point out how to use that images ?