My concern for this project is that it is so dependent on the culture of its users that is has to be strictly controlled. It cannot scale up, because a strong culture like this does not scale. There might be more Tilde Clubs over time, but such a machine is too easily disrupted by even a single bad actor, like peterwwillis says. Even if that did not happen, cultural erosion would happen, like a mini Eternal September or take your pick of communities: Reddit, Slashdot, HN, etc.