Rich, it's always been policy in the Buy/Sell forum(which is appropriate & needed), but now it is in the forum TOS as of this past week.
"You also agree that you will not use this forum to promote other forums including but not limited to ebay and similar websites via the posting of their web address, whether via a hyperlink or via text."
My post that got deleted wasn't promoting any other forums and wasn't in the Buy/Sell/Trade areas. Hoop.la flagged it.