And there’s the program to give certain power users the option of buying stock before it debuts on the public market.

I am curious about seeing how this plays out. Let's say multiple users, who are inexperienced in investing, decide to buy-in... And then the stock price plummets shortly after IPO. I know very little about law and so I am only speculating here. I suspect that the users might have a legal case against Reddit on the basis that they were sold a risky asset under conditions generally reserved to experienced investors. The inexperienced users could not have been expected to fully understand the risk. Even if the users are given the S-1 form and asked to sign a legal document stating that they understand the risks, I don't think that this would be enough for Reddit to not be liable.