Former Pirates of the Burning Sea players (account must have been closed and inactive since January 22nd, 2008) have been invited back to the game for a free month, which kicked off on February 5th, and will end on March 5th at 11:59 PM PST.
Surely no coincidence, this latest offering comes hot on the heels of the launch of version 1.22 last week, which among other things, consolidated the playerbase into two remaining servers.
View the original announcement here.