i have playd since ep1
first dupe method was with mails sending during wars cuz of lagg u could send more mails and save more:P(i was 1 of the creators of this dupe ^^)
second one i traded a different hack of me with some1 for this hack: quickly send some mail be4 maintenance most cases 3 mails will be send if done good. WE knew when maintenances started and endd so be4 maintenance we send mail and after when maintenance started we already started trying to login. To secure i was the first to be online. When i get in , i quickly opened up mail and pressed save as much as i could cuz it lagged that 1 moment.
but the 3th dupe method was posted on this forum by some1 else. Which is basically plug offf internet connection just be4 sending mail and quickly plug it in

and the same when uwanna save the mail
I guess u managed to bypass gg and are gonna try these methods well goodluck