Believe what you like but the GB doesn't write for publication.
The Borg structure is broken into Committees. Each committee has a GB member nominally at its head. Any other "anointed" members in the committee are there by PURE COINCIDENCE, and only because they haven't died yet ('new' anointed have no standing at Bethel). The size/number of committee members is unknown to me, but it is probably something like 3 to 5 people. The committee oversees a Department. The Department consists of the people who DO the actual work.
Every Wednesday the GB meets. They get updates from committee heads and the rubber-stamp pretty much everything they're asked to. They then discuss what they think should be done in the future, vote on it, and the committee heads bring those topics to their committees to implement.
The actual writers are NOT anointed (unless of course they are 'old' anointed who just haven't died yet - my guess is the number of these in all of Bethel is less than two dozen, and none of them are young enough to still be 'working' like a rank and file Bethelite).