Hello,
I think this would be a useful feature for people who browse through art/characters shops a lot !
I would like the ability to hide a thread so it doesn't appear on the thread list anymore (like ToyHouse does), or at least an ability to mark a thread as "seen" that would stay even if new messages are added to that thread.
We have different kinds of icons for "read", "unread" and "answered", we could add one more icon either for "new" (thus showcasing a thread that we've never open before, icon is different from a thread we have opened but that got new answers), or for "seen" (this "seen" icon would also stay even if the thread is getting new answers).
That way, we can browse through the art shops and character shops and either hide the shops we aren't interested in, or at least have them marked as read so we know which ones we didn't check yet.
This would avoid us shopper from having to open every thread again and again. It would make art shopping much more enjoyable.