But why not let non-members read about the useful work the foundation is doing rather than restricting read access and adding fuel to the fire about non-transparency, an insider cabal etc.
Somebody could sign up as a member and then try to screen-scrape and republish everything somewhere, so members should assume that whatever they say will eventually be public. 
This is why the smoke filled room was invented. Get with the program people! If you're going to subvert everything good about bitcoin, at least do it in absolute secrecy.