Could there be a system implemented that would allow current players (non-trial) the ability to send a trial invite via email, (via a in-game token or counter of sorts, giving a way if needed, to limit the amount of invites sent per account) to friends that really want to try the game before they purchase?
I have had many requests from people that would like to join the game and our guild if they got a chance to at least play the game first.
Even if the trial was only good for 10-24 hours of active logged in play time, with it ending with the Black Lion Trading Company window opening, providing them the ability to purchase one of the online editions right then and there, and then continue playing after purchasing in-game.