As stated in the title of the thread, this is only a theory.
However, If any of you have been going to the WoW Community site you'll notice the Recruit-A-Friend stuff on there. I looked into it, you get a mount for one character, 1 free month of WoW and some more in-game goodies.
Summoning to or from the "Friend" account and your account, Triple experience, and for every 2 levels on the new account you get a level up for a low level character on the Recruiter account.
So what if you got a trial account through recruiting and payed for it, if you have Alt-itis like I do, you could essential level a low character up doing nothing while leveling a new account for whatever you want to do. Me, I like rolling 19/29 twinks, so you could level the twink in triple the amount of time, as well as leveling yet another higher leveled character up as well.
I have absolutely no clue if this is even understandablem but I hope it can be of use to some or provoke thought from others.
Regards,
Darkassassin