From KGB Wiki
Whenever a KGB member leaves the organization, whether it be for greener pastures, a paying job, or simply because they've reached escape velocity, they have turned their back on their people and become defectors. KGB loves its defectors dearly, particularly those who donate heavily to the Booth budget.
All the important defectors are on this list.
To join the defectors list, go to http://www.cmukgb.org/lists/listinfo and enter your email address.