Found nothing about this so here it goes
First thing u need is either full info on a account or (if u dont have) email and sa!
Ok so ur up for a trade on your not activated wotlk account
u want to have it activated but u dont want to pay for it, here is what u will do...
Find a trader that doesn't have wotlk and say Hey , talk talk talk talk .,,,
Come to the trade and say, (u need full info here) ok so we trade now?
he will answer : yes . and you start to switch information.
so lets say u got an 70 right? and he will then buy wotlk to level...
all you have to do is wait for him to activate wotlk then call blizz and get your account back right? (i usually wait until they have dinged 71
Now for just SA and Email....
Start to trade and talk talk talk talk ....
U came to the trade point and shall start switch info...
u say u only have username pw ...
they will say the same.. as they will not give u more info then they get from you.
then u just exchange usernames pws .. and wait for him to activate the account ..
Then u just recall with SA EMail ...
it have worked for me 10/10 times. (btw i allways have full info)
Sorry for long thread ,,,
CYA