Think of it like this. Since we're using the business term "monopoly" here, let us look at it in that perspective. You say we're a monoply, yet we take no action to make the entire market exclusive, the only thing that is exclusive is who can recruit on our private server, not the entire opportunity for anyone to recruit in the game. It's more so not the fact we're a monopoly, but that there is no competition in the business. From a business perspective, the "product", in this case the server, is undisputed in conpetition, therefore bound for success.
In economics, competition is the rivalry among sellers trying to achieve such goals as increasing profits, market share, and sales volume by varying the elements of the marketing mix: price, product, distribution, and promotion.
We have our marketing in media, screenshots, and server population. The fact is there is no competition to begin with, therefore there is nothing that would stop us from a successful server.