06
The dataset
Priors that compound
Technology
A structured record of every experiment — what was tested, on whom, what it cost, and how conversion to paid, revenue per user, and retention moved. Feeds hierarchical priors into system 1's scoring and system 4's ranking.
Hard problem
Experiment results die in slide decks — the same lessons are paid for again with every new test.
Differentiator
No public source reproduces it — it accrues only through operation and compounds into per-client switching costs.