Shouting in the Trade Channel
I believe you should not post your profession links into trade channel as LFW
Yesterday I saw someone in trade shout out "/2 Epic Gems now on the auction house at lowest prices." That screams, cancel, repost, and undercut to me, if I'm a major AH gem player. Idiots. You don't want to alert your competition that you just undercut them!
Instead of general broadcasting, just look for people you are looking for specific items in trade channel and send them a private message with your link and your fees. This way you can continue to fly under the radar. Think about it.