Why have these elite left?

Four role-playing characters have not been on Stardoll in over a month! No reason has been given and it leads some to suspect they are all run by the same person! ImAliceCullen, Bella_La_Swan, JJacobBlack, and EdwardLa_Cullen are on this list. On Bella's page it says that Edward is also her account, but what about Alice and Jacob? They are all on each others best friends lists? And why have they not logged on in over a month? If anyone knows the answer please respond in the comments!!!