Very interesting. I think that a lot of these companies are dependent on advertizing revenue, but so is both Facebook and Google. I guess one has to see which companies are dependent upon advertizing from start-ups rather than established companies to figure out who is most vulnerable in a downturn -- although you said that overall ad rates decreased during the last correction across the board.

I wonder to what degree that would happen again. I think percentage wise it is likely to be less severe than last time, but it could still be significant.

We have no real data form Google on pre-bubble/post-bubble advertizing as they were not advertizing at that time. But it probably would be a horrible hit to them this time around -- even 30% correction would be severe.