1. YOLO. Yeet big data into orbit!
2. People will pay big bucks to keep their data all the way up there!
3. Profit!
It could make sense if the entire DC was designed as a completely modular system. Think ISS without the humans. Every module needs to have a guaranteed lifetime, and then needs to be safely yet destructively deorbited after its replacement (shiny new module) docks and mirrors the data.