Whoever reported him actually did all the prospective buyers a favour.
because guess what, they would have found out he was selling invites any way you take it. When they find out after people bought the invites, then they ip-ban all the accounts created using the invites and also ban his account.
So the prospective buyers would have lost their money.
That's why if you want to show a pic of your account, you have to blank out your username, messages, part of your ratio and ul/dl and the amt of invites you may have if any at all.
They can use any one piece or a combination of the above info to identify your account.