How many items/documents/folders with unique permissions can you have per site collection?
I am aware of the boundaries of 5,000 scopes per list/library and 5,000 members per scope.
I assume it is acceptable to use a SharePoint site as a container for each 5,000 items/document with unique permissions (as Issue 2 in this article indicates: https://technet.microsoft.com/en-us/library/dn169566.aspx). Now, 250,000 sites are supported per site-collection - does this mean you can build structures that support 5,000 x 250,000 items/documents/folders with unique permissions?