Oh, sure; I think the parent commenter's point was in thinking that emailing everyone about the termination of the leaker served as any sort of deterrence mechanism for people's use of the leaked build.

Well, emails are not exactly deterrence against people using the leaked "build": being an internet service company, that part is usually achieved by shutting down the server.

Emails are supposed to be deterrence against further leaks by reinforcing the "company culture". (Whether they work, I have no idea.)