my best guess so far is it relates to a level of security clearance. As in when POTUS declassifies it And it goes from C classified to U unclassified they are done..
An
Unclassified (U) is a valid security description, especially when indicating unclassified information within a document classified at a higher level. For example, the title of a Secret report is often unclassified, and must be marked as such. Material that is classified as Unclassified // For Official Use Only (U//FOUO) is considered between Unclassified and Confidential and may deal with employee data.
That would go along with the Imperator Rex thread above, copying here for ease:
1768
Q !CbboFOtcZs ID: 2b8bd6 No.2362968
Jul 30 2018 20:19:04 (EST)
LOOK who's writing about Q in the 10 latest news articles
about Qanon.
They are pushing the pizzagate / accusing actors of
pedophilia angle.
they're skeeeeeerrrrd
>>2362960