A: An end to end encrypted File Share
B: Replacement for Hive's image servers... and users can update or remove old images(to an extent, it's public after all)
C: It's generally so users can use rich media... and can be platform agnostic.
D: Let's you become the service provider for others who don't want to run websites.
E: Allows platforms to innovate with next to no costs, as users can bring their content and be responsible for storing it.