When ppls create account in game he need a email rigth ?! Then why GM Team dont make a macro or something like this to send email for all emails used to create accounts saying what he have of new in the server like events...
And at begin of week send a mail to all saying: Guys dont miss this week... abyss at XXX, undead at XXX, Big Maze at XXX and saying what maze pk on and what is pk off including the war times and explaining the diference between the server time and most of countrys (Exemple: Local War Sunday 22 Server Time - Brasil -3, Argentina -3, Espain -XX, USA -XYY, England - ZZ, etc) that have players in dr.
I think this is not soo hard to make and maybe motivate players to join at game to pk at wars, mazes or just to be part of a event.