I actually made a website called Y2 Combinator, which was the Y Combinator that starts Y Combinator clones. There's a very clear difference in the quality between the companies that come from YC and the companies that don't.

When Facebook famously moved out to Palo Alto, there were people in the same house Facebook was based in working on different ideas. It is vital to remember that.

It's very possible that advertising business models will simply never do as well on mobile devices as those oriented around transactions.

Patrick Collison Quotes