Well, if ye kind of switch games often, really, what's the point? I would suggest buying a month game card or somethin' that way when yer time runs out and ye want and ye want to switch games again, ye don't have to worry about canceling the bills to yer credit card and all that.
More info about game cards can be found at:
http://piratesonline.go.com/v3/#/acc...gamecards.html