They contact you through skype. It's how staff members communicate when not on graal.

One con that I found for me personally was that becoming staff is a sort of 'end game'. After I was hired, I wasn't as motivated to keep playing because becoming staff was what I was working towards. Once achieved, I didn't have much else to do, and as a result I don't get on graal as often anymore. This may be a pro or a con depending on how you look at it.