Without going into too much detail, investors aren't generally in the business of losing money and at the scale of investment we've taken we're far beyond "bet on the team" kind of diligence.
Managing inventory and pricing risk is a key piece of this business and has been since day 1.
We really owe the world some blog posts, but until then hackers, data scientists, and predictive modelers are always welcome to come by the office for lunch!