Hi everyone, wasn't quite sure where to put this but since it seems more of a technicality with mogstation possibly that I'd put it here.

I currently play on PS3 (will be switching to PS4 when available), but my brother is an avid gamer like myself so we both battle for time with the TV. I thought rather than battle this out I could get a second license for my mac (bootcamp to windows) and play on there while he plays whatever on xbox/ps3 etc.
Let me clarify he doesn't play ffxiv so I'm not trying to get multiple people playing simultaneously.

However I'm a little hazy on the details behind the process and what I'm paying for with the second license. I understand that I need a windows license as it's a different client, which is fair enough, but I'm wondering if there is an option to just buy the license. I bought the PS3 version for £9. Now I'm looking at PC and it's £20, so I imagine £9 of that is really the subscription cost for the free 30 day trial while the rest is the license for the client.

tl,dr: If I get the £20 pc download, will I get an extra 30 days subscription applied to my service account? If not, is there anyway I can just purchase a windows license, free from the trial? It just seems a waste of £20 if nearly half is a free trial I won't get.

Thanks for looking, hope it's easy to understand what I'm asking and if it's in the wrong place I apologise, mods feel free to move it.