I manage both the Enterprise and ArcGIS Online Portals for my City with around 1000 total users. One of my most used tools is the Member Reports, Item Reports, and Credit Reports from the Status Page in both my portals. I export those reports almost daily and run them through an FME process to combine them with other city reports, just so I can turn that data back into a feature service and plug it into a couple of different dashboards.
In those dashboards I'm tracking who's completed what training, who owns the most old content that should be deprecated/deleted, who belongs to what department, who their boss is, and even who's been inactive for so long their account should be disabled.
It would make my life much easier, if instead of having to schedule, then manually download the report .CSVs if they were just accessible as a feature service.
I attached a screen shot to help illustrate the sort of things I'm doing with the data.