Hi! I'm revising my review from below titled "Other" in which I thought there was no working "claim listing" feature. (There is no edit feature to revise these reviews after they're posted on CodeCanyon.)
The author responded to me, and he is correct. If the administrator deletes his or her name from the author field when entering a new listing, a "claim listing" button will appear automatically on the new listing. When the business owner claims that listing, ownership of the listing transfers to the business owner.
With my main concern gone, I'm revising my review to 5 stars. This is a beautiful-looking theme that produced a marketplace so attractive and functional, I don't see ever needing to replace it, even when the marketplace is successful.
One caveat: We are not planning to charge money for our listings. So I have no experience with the theme if you plan to charge for your listings.