There is nothing at all morally or criminally wrong with transferring an account for a fee. However, it is common for game companies to attempt to bar such a practice for the reasons Weasel articulated, namely to manage their revenues.

Whether the SAS syndicates decide to report people who sell their accounts is their own prerogative, and whether it is an underhanded way to compete is anyone's to debate.

However, it is clear to nearly everyone, except the usual troll, that it smells of jealousy and desperation. And, the way SAS chose to announce their decision to report transfers leaves the typical bad taste.