When I made a journal about it no one really piped up about wanting it but in the end I just decided to make it anyways. We now have a n advertisement folder available to be submitted too. Advertise your available commissions, contests, trades, requests, kiribans, and adopts journals there. However actual adoptable submissions will still go to the OC folder.
UPDATE: decided to make an adoptable folder too! It will be for Monster High inspired adoptables. Regular monster character adopts are allowed too as long as people have the option to use the adopt as a Monster High character if they want to. This means Adopts will no longer go to the oc folder unless they are closed.