why do you want to get in sites that you know nothing about ? A remind of your first post : " I heared of both are invite forums"
come on dude
everything has a beginning
it's quite obvious that if some site doesn't want for it's url to be revealed, it's very stupid to try to join it by trying to figure out the url. maybe you already blew the chances of joining them when you was born, but now you did it one more time for sure