What the hell? I made a sales thread on a unique offer I was doing, and one week later, I get some "Duplicate Thread" Warning and the post is now gone. I've never ran a deal like that before, I don't even remember what the last Article related thread had in it. Do moderators just randomly delete whatever they feel like deleting? That was no way a duplicate thread, because I've never done anything like that before. Do you mean to tell me, we can only make one sales thread the entire time we're here, we can't edit it to change our offer or our deal and any future posts made will be "duplicate posts"? Seriously, what the hell? I was getting some good clients off of that post and one week later, it's just gone.
If your sales thread is for the same thing (or something similar) that you made before, yes... it would be considered a duplicate. You can edit old sales threads just fine if you relist it.