Aaron Epstein: In this video, we're going to be talking about business models and pricing. The first is the nine business models of nearly every billion dollar company. It turns out there's just a handful of them that build the biggest winners. Next, we are going to talk about business model lessons from the YC top 100 companies list. And finally, we'll cover some startup pricing insights that we've taken from the thousands of companies that have gone through YC.