Personally, I have no idea, hence, no answer.
My guess though is that you have to pay for everything the industry wants to charge you for, that is to say, every little "new" edition they can come up with. Like with movies.. there's classic versions, remastered, director's cut, VHS, DVD, Blue-Ray, HD-DVD and whatnot.
What's certain though is that digital rights, at least in Germany and probably elsewhere too, are one big uncertain mess, since the Internet is still such a young medium, relatively speaking, and evolves too quickly for the lawmakers to catch up with. Just a couple days ago there was an article in German computer magazine c't about reselling. According to law, physical mediums may be resold indefinitely, because once a copyright holder puts a certain item in circulation (or rather: sells it), his right concerning the distribution of said item expires. But what about pure electronic downloads? Licenses? The law is so old that new license models or downloads weren't even thought of at the time of the law's conception. So some company sued a reselling company for copyright infringement or somesuch. One court in the south said they were right. Another court in the north had to decide about a similar case and said they (the other court) were wrong in the first place. And the highest court that can actually clarify everything doesn't seem to be in a hurry to do so.
On topic, since I only really played FF on the GameBoy a couple years ago, that's the one I voted for.