Does anyone know if there is any rhyme or reason to Vista Print's discount codes? I'm wanting to order my daughters birthday invitations, but right now the best I can find is 20% off. I have a little time to spare to order and just wondered if anyone knows how they release codes or is it just luck? Is there any other sites similar I should consider? I bought the image from Etsy and I just need to upload and print to a cardstock type material. I'm not crazy; I know these end up in everyone's trash, so price is key I do prefer not to do photo prints if I can help it. Thanks!