You have to remember those terminals are used by people who earn USD1M+ with bonuses. Which in turn means that they have to make their employer at least USD10M+ per person. Their expense accounts for entertaining clients, in a month exceeds the annual cost for the Bloomberg terminal.
lol I don't mean to be dismissive but that's not necessarily true. A lot of people have bbg terminals, even back office personnel with relatively modest salaries. They need it for their work as well.