Each DC Universe Online subscription is locked to an individual game disc, meaning there's no point buying a second hand copy of the title.
Sony Online Entertainment said in a statement issued to Lazy Gamer: "Once the PSN key has been consumed with a disk it cannot be resold/replayed with the second user adding a sub - only the original consumer can use that acct."
To be clear, a new account can't be obtained by a second hand buyer of the superhero MMO.
"Disk and account are one," SOE confirmed.
Last week, SOE began offering a significant discount on three-month US subscriptions for the PS3 version of DC Universe Online.