[CaptainGreenGene]

The cards are available in CVS stores in my area and also in Best Buy stores in my area. A simple call to the local CVS and a credit card and they are sending me one in the mail right now. I'm not sure how they would react to a call from outside the country but I will ask the front store manager at my wife's CVS (she is the Pharmacist in charge) and see what their tolerance is for mailing things outside the states. Best Buy was not able to send them out when I called today but they were willing to mail them if I contacted the online store with a special request. They did, however state they had them in stock. Seems like a lot of work but if you really have to play POTC then GL. I did indeed search the online vendors and didn't find any cards available any longer so I do apologies for the incorrect information. Oh an back to the question, yes I think anyone can play as long as they can download the game, connect to the internet without restriction and yes indeed if you need to be unlimited, pay for it.
Addendum:
OK some times I think we just try to make up Rube Goldberg ways of doing things so I tried to simple this down. First I called back the CVS and had the manager there read me the numbers off the back of the card so they don't have to mail it DUH should have thought of that right off. Second, I used a Visa card to pay for it but I asked what if I had an over seas card or gift card and his reply was "if the machine takes it then its fine with us and our machine accepts almost any card". Again, there should be an easier way to do this but at least it can be done.