Pretty sure it was stopped because I abused this system quite frequently in the the past. It was as simple as just finding out an email on a graal era account, and then logging onto classic and messaging a GPA such as NeO and asking him to transfer the account, or change the email because I knew the email and location of the player when they didn’t log in for say a month. Stole multiple accounts that way, even Anero’s and that’s why the system was improved/taken out in the first place.
The last case I can remember of an email transfer was in 2015 or 2016 or something when I hacked into a Facebook of an era staff member, traded all their items to my account, and then SNK merged my account into their email and they got all my items.