Originals

Does anyone know what the criteria is for artwork appearing on the Originals search from the Shop Menu? Does the original for sale option need to be checked? When I click on that I see a lot of very fine artwork, but not all of them are paintings which I assume cannot be offered as originals. I understand and support the print on demand business model, as most of my sales have been prints, but still I am looking for an online venue that makes is easy for a collector to fine original paintings? Ebay and Etsy have search criteria to search for original artwork so I'm just wondering how does a collector truly find original artwork on FAA.