As you already know, RenX is a team of volunteer individuals who have other jobs/careers. My career is in the I.T. field where we have cabinets, servers, and networks all over the world. With access to so much bandwidth and hardware, wouldn't be hard to supply the demand for this game.
One of our plans is to create a game server in a cloud infrastructure environment, then create a snapshot/template of that cloud server. If game server 1 fills up, we can use the template and spin up additional gameservers to keep up with demand. Along with that, there has been a lot of community involvement where they would like to provide game servers as well.
I bet if there is sufficient demand, there will be individuals (not us) creating more game servers. It's just like any other game, people will fill the need of game servers if there are gamers who want to play on it.