There's also the training costs, which are a massive capital investment, that need to be spread over all subscribers. Depends on training schedule as well, for

There's also the training costs, which are a massive capital investment, that need to be spread over all subscribers. Depends on training schedule as well, for each training window the costs of it need to be spread over subscribers during that window. It's good it scales down with a higher number of paying subscriptions (each pays a smaller share of training costs).