I am aware about the hacked accounts and stolen credit cards. But I think that they would not be banned for "RMT advertising or RMT/illicit activity". Guess it should be in another category, since once you can indentify that the source of the payment is ilegal (profit lost), you could just ban / innactivate the account for that. In case of reported hacked accounts, they should work to assist the hacked player, instied of ban it as a RMT.

Is there anything about it on the terms of service?

Otherwise, they would be just inflatting numbers of that RMT bans reports, I guess.