Fair question, and the honest answer is that you are probably already reading this site for nothing. The guides, the lab profiles, the calculators and the investigations are published in the open and they stay that way. None of it moves behind a paywall because this exists.
So $39 does not buy secret information. It buys the organized version: the same discipline pulled into one handbook, one library, one set of SOPs and one card deck, kept current, sitting inside a dashboard that walks you through the check in order instead of leaving you to reassemble it from a stack of open tabs every time a vial arrives.
The other half of the answer is already on this page. No fabricated reviews means no borrowed credibility, so the launch price is what carries the offer until real ones exist. That is the whole reason for the number, and it is why the number moves to $59 later.