Lifetime Premium Payment Option (One-Time Price)
I would love to pay for and support TSM4 (I'm sure I would also enjoy a premium feature or two).
But I am a very erratic WoW player/goblin/everything. The only way it makes sense for me to pay for a WoW service is if I can pay for it once and use it when I'm engaging in the game.
Please, please, please, oh pretty please offer this payment option.