My experience has been that a monthly all-hands for 200 people is pretty good. More frequent meetings than that should be smaller, because the alternative is t

My experience has been that a monthly all-hands for 200 people is pretty good. More frequent meetings than that should be smaller, because the alternative is talking about group-specific stuff that's irrelevant to most people. Your company should subdivide as it grows, and the meeting/governance structure should acknowledge that fact. Weekly for 500 people sounds insane.