It says on the website who to contact. I think you can also look for Daniel Miller, I think you can also invite you. And yes, it's "secret", it's a hidden group that not everyone on Facebook knows what kind of problem you have. What better way is there to get in contact with EC sufferers? I don't see the problem.. :) It's not like it'll take weeks for "the guy" to invite you. And if you don't want to be friends with him, quit your Facebook friendship after you have joined :)