What exactly are you offering here -- a scraping and archival service? I'm presuming you're claiming "real-time" because Facebook page insights are already real-time [1], and you periodically scrape and archive that data [2]?
FB reports analytics in realtime, but not all social analytics companies fetch them multiple times an hour. It's impossible to get insights for a page without the owner's access token, so this just uses public data. Also, FB doesn't show how long posts are active, which I find most interesting.