Prohibit the advertising of content sales via the cross-server PF
1. It's spam - Other examples of spam include FC recruitment and Casinos, but blacklisting takes care of those fast and with ease. No such option exists with the PF.
2. It promotes RMT - Receiving payment across servers
3. It engages in prohibited activity - http://support.na.square-enix.com/ru...1&tag=users_en
"3.1 Sharing Account Information. You may not share your account or login information (such as your Square Enix ID and password) with anyone except your legal guardian, your minor child, or Square Enix. You are responsible for maintaining the confidentiality of your account and login information, even from your friends and family. If you violate this provision, you may unexpectedly lose access to your account to a third party without recourse against Square Enix. Square Enix will not be obliged to credit your Square Enix Account with Crysta or other points or awards, which may have been used by a third party as a result of the violation of this clause."
The ideal solution would be to add a way to filter out such advertisements in the cross-server PF, but that won't happen anytime soon.
Update: http://forum.square-enix.com/ffxiv/t...=1#post4500631