No it's because they h ave added a number to the accound id's if you look in the other forum under development they have a fix for this hack.
It's to add a number to all the ids so if the number is 1000 the first (gm) account would be 1001. But we dont know what number that have added to the accounts.
Does not work with revenge, at least i could not get it. It has different account ids than the rest ie does not start at 1 but even when you find your own, i could only log into my account hlpex did nothing.
btw.
the site is http://www.l2revengeserver.com/site.html