Fair enough, I should have said that giving the addresses is the problem. New RMT sites are created all the time and any CCP blocklist would be difficult to keep current. We can talk about it in general terms, like “you can find RMT sites via a simple google search” but providing the info directly, even though you are not encouraging players to use the sites, on the official forums, could run afoul of the EULA. These types of posts are typically edited by ISD at some point.
EULA section 6b:
The buying, selling or auctioning (or any attempt at doing so) of characters, character attributes, items, currency, or objects, whether through online auctions, newsgroups, postings on message boards or any other means is prohibited by the EULA and a violation of CCP’s proprietary rights in the Game.