1) You don't need a site to join, just an email and a country. And, please, a valid email adress.
2) But if you do have a site you must put a code or link text.
3) Be sure to keep the code up at all times. If you don't link back to the site, your site won't be link back. As easy as that.
4) No direct link with the codes, save them in your own server.
5) If you have site, no porn or hate sites will be accepted.
6) Can follow the rules? Then go grab a code and join now!