you need to also remember it's only open beta and there is obviously more level 60 content going to be unlocked with new ways to make AD a good idea for them would be an area for level 60's where you can do dailies or events in the area and if u win you get AD but i have faith in what there going to do to improve the AD…
Price of wow is 14.99 each month i used that as an example and even with those prices u pay every month they have mounts and pets* you can only buy with 25$
because the mounts are purely cosmetic and have no affect on game play but if you mess up on your spec for pvp it will leave u at a huge disadvantage with other players.