Hi! I'm the article author. AMA :)
1) You mention that some people never used the invitation or used it but didn't complete the initiation. "Why were some of us drawn in like moths to a flame, while others reacted zero?" You also mention some trepidation during your own initiation ritual. What made you go through with it? I'm a healthy young male, and I feel nontrivial trepidation at the thought of going somewhere unknown, alone, knowing I'm being watched, not knowing if I can get out, surrendering my phone and wallet, seeing the glass of who-knows-what...I imagine these fears would reasonably be stronger for many others. Is it reasonable for the society to ask such trust from people who haven't yet interacted with it? Presumably the danger and the fun are intertwined. Is that necessarily a good thing? Does it have negative filtering effects on society membership?
2) What happened if someone going through the initiation ritual didn't play along - didn't go down the slide or leave, didn't move on from the library at the appointed time, hid their phone then tried to record the Fable, etc?