alt Hacker NewsI don't think there is outsiders vs the rest. Either you propose content, accepted talks or workshops, and you can come or you buy a ticket. Everybody has the same "chance". If you miss the ticket but really want to come you can try your luck at the entrance, there are usually always some people who can't make it but it's of course a bet.
I remember a mechanism where you could redeem a single-use invite token, which would return another single-use token when consumed, which could then be chained idefinitely. Local CCC groups where given a few such tokens to get their members and friends in.