24/7 Stories is a great advertisement shop! They are advertising stories for free on their page as well as on their Facebook page. I really recommend them because they work fast and also seem very genuine in wanting to share your work with every community, which is very kind of them to do for so many people. There are no limits and you can even re-request your story to be posted. The request form is extremely easy and convenient to fill out as well. Please spread the word about them~