There is no filter on Osortoo where you can select a winner who is subscribed to your account. The reason is simply that Facebook does not allow us to access those information on your account. However, you do have access to unlimited re-draws with Osortoo. We recommend that you check manually if the winner follows your social media account. If one or more of the winners do not respect all your rules of participation you can redraw one or more new winners in order to find the right one or ones.