I make blueprint systems for market, and each time I create a thread, it goes down very fast. It also a bit difficult to follow for other interested threads. I see one on the first page, but after couple of hours it moves to the second page, then to the third. A bit annoying. Moreover, it’s harder to get feedback for my packs as it dissapears from the top too quickly.
So my suggestion is to make sub forums for categories of Marketplace. It would be more effective in my opinion, as Marketplace and UE4 become more popular and there are huge amount of packs will be submitted and posted on forums.