No, you haven't paid for new armor sets. You've paid for server upkeep and access to the game, silly.
That isn't any more true this time, then it was the first 500 times it has been said in many other game forums.
We pay for them to continue the developement of the game. Every player of every MMO in the past knew this...sad that developers have recently (over the past few years) have decided to claim ignorance.