The per-user costs here are web servers and customer support. The bulk of the servers are only doing one thing, so even though there are a lot of them, you could mange them with a hundred people. So that leaves customer service as a per-user cost. It's possible that the customer support department has 2000+ people, and that would be a satisfactory answer. But if that's not the case, then "employees per user" is pretty irrelevant, and the question stands.
