Taking a job would take up all the time and they wouldn't have time for developing the server. ( implying that they don't have a job yet )
Plus, there is no other server this big and this much modified without taking some sort of payment from members.
This isn't made up for fun, this whole game is made up so they can gain money. This is their job.
Roodi, this is real life, a real life company making money from a game, this is how it works, this is how the whole world works.
If you pay you get more services.