Also, to be clear: the statement is meant from the perspective of, how do they have that many employees (what are they all doing); not "why" do they have that many (which, while seemingly very large, I am not in a position to judge), nor meant to be a slander against outsourcing R&D work to China (though, to be crystalline clear, I inherently trust Zoom less because of this, just like I trust companies who base or outsource R&D to Australia less because of Australia's laws on these matters).
With good management, a team of 50 should be able to provide what Zoom provides.
Of course, with this read comes the age old question of "I can build Google/FB with 20 good men, what are they doing?"
Well, this would explain Google's pattern of constantly churning out new products on the theory that hey, maybe someone somewhere wants it.
If you need 20 people to run your actual operations but you've hired 20,000 people, what are the other 20,000 people supposed to do?
Not to defend them against the recent security fiasco, but innuendos such as this that links "employees working in China" directly with "shady business" makes me at least uncomfortable.