Board Thread:Game Discussion/@comment-23.30.137.141-20130808141412/@comment-75.69.61.24-20130808231251

Mobage will convert any guest account (sparkXXX/gamerXXX) to a regular account if that person gives them an email address and a new gamer tag. I will create a new email address and whoever buys the account can pick the new gamer tag. Once the account has been transferred by mobage, I hand the new owner the email address and password and they can log into the account from their device.

Unless mobage is going to stop converting guest accounts to full accounts, there is really nothing that can be done about it. Someone else can reap the rewards of what I've built and continue to carry the account forward.