I purchased a power leveling service from THSale for my nephew so we could play together. Brand new account, never used. The account was suspended for economy exploitation when character was around level 18. I contacted THSale and of course they claimed it wasn't their fault and the account must have been hacked. After the 72 hour suspension, they restarted the service and the account was perma-banned a few days later. After several hours on the phone, I gave up and contacted my CC company to reverse the charges. THSale just wanted me to wait and they said account would eventually become unbanned.
Further review of the account via the armory showed it still had level one armor at level 23 and it was all red. A sure sign the account was being botted.

Summary; Do not use THsale. Despite their promises they will bot your account and use it to filter gold through the wow economy. Both actions are bannable offenses and THSale will not refund your money when it happens.