What is the ruling on purchasing large numbers of pirated accounts and distributing them for free to followers, on condition that they use a promotional code specific to the distributor to earn a commission, knowing that these accounts do not allow the user full control over them?

Usually, websites and programs prevent the creation of fake accounts to take advantage of offers. If the game's terms and conditions prohibit this, then it is not permissible to buy or gift such accounts. However, if the game's terms and conditions do not prohibit it, then there appears to be no impediment to buying or gifting such accounts, provided that you use your own special code.