An equal number of posts. I think having the linked names in the fic and art sections may be confusing to people, since it only goes to the FIRST one (I was dismayed to discover that a link will go only to that comment, not to that comment's place in the post, so you can scroll down to see more; but ultimately decided that the single item/single thread was better because 1) most creators did only offer 1 item, 2) having a linked list seemed like a good idea to more easily find people, and 3) I didn't want threads to get tangled so it wasn't clear what people were actually bidding on.

Pro tip: if there's a description of the item beyond the basic category (i.e. 3-5K fic, Knitting Tutorial, something like that), then there's more than one item being offered by that creator.