Now it will be available on another digital distribution platform besides GOG.
It seems strange of Akella to re-re-release a 17 years old game, so maybe there is hope for POTC (probably as "Sea Dogs 2" I guess).
It is scheduled to be unlocked for playing on 12th January 2018 and it hasn't got a price tag yet, so you can only wishlist it for now, not buy it yet (at least in Poland, but this may be caused by the recent great currency switch on our local Steam branch, so better check for your country, link to store page below).
I think someone more qualified should make an annoucement on the PA front page, but that's just my opinion, I'm very happy to share the good news.
Sea Dogs on Steam