You are wrong.
To earn free 1 month reward, recruited account should buy the standart edition and pay for 1 month. That costs around 28?.
They ask around 6-7K per month, with the current gold prices makes nothing. You may think they are using that accounts for botting, but thats not the case. No one needs that many accounts.
What they are doing is highly illegal, standart wow edition and 1 month is acquired with a stolen credit card so costs them nothing.
Thats why the prepaids key they gave for frozen accounts expires so fast. When the stolen card's owner appeals to payment. Prepaid key is removed.
However I dont understand why the RAF gametime stands still neither why Blizz is not taking any action against it.
Mining Bots are everywhere again - Forums - World of Warcraft "...fueled by stolen credit cards..." mentioned here.