There are conspiracies that need ferreting out, but they do not revolve around generating fake data about the effectiveness of an alpha version of a rationality training camp that was offered for free to a grateful public.

I don't think anybody is accusing the minicamp folks of anything of the kind. But public criticism and analysis of conclusions is the only reliable way to defend against overconfidence and wishful thinking.

When I ended my term as an SIAI Visiting Fellow, I too felt like the experience would really change my life. In reality, most of the effects faded away within some months, though a number of factors combined to permanently increase my average long-term happiness level.

Back then the rationality exercises were still being worked out and Luke wasn't around, so it's very plausible that the minicamp is a lot more effective than the Visiting Fellow program was for me. But the prior for any given self-help program having a permanent effect is small, even if participants give glowing self-reports at first, so deep skepticism is warranted. No conspiracies are necessary, just standard wishful thinking biases.

Though I think this was the third time that Silas raised the question before finally getting a reply, despite his comment being highly upvoted each time. If some people are harboring suspicions of SIAI covering up information, well, I can't really say I'd blame them after that.