@rawr101... threads also get closed once they hit a maximum number of posts maybe thats what happened with yours
i have never had a problem making multiple comments in my trade posts under 4 hours,
it is always useful posts though, for example i will have 4 things for trade one person posts asking for one of them... we pm and make the trade, i post in my thread saying that that item is now gone... and none of my threads get closed
however if someone posts in your thread saying "bump" or vouches or anything non trade like that and you respond with "ty" or something thats considered early bumping and will close your thread
also i vote no!