How obnoxious they wouldn't just tell you about it straight up in the denial letter. It isn't like some national security secret or something. Wow.
My fault-- I left a misimpression here, sorry; when I wrote:
...that I was completely unaware of until the first rejection I received right when global entry was introduced..
I meant to clarify that that first rejection -did- state the nature of the infraction (I had no awareness of it until that moment.) The FOIA stuff was to find out the exact details so I could proffer a more complete and productive reply.
Again, my fault for not making that clear.