At or near the bottom (or is it top?) of this "bubble" funnel a lot of high valuation investments from "private" money acquisitions & other supposedly smart money, like the recent AirBnB investment. Were $10bn valuations possible without public markets before recently? Does that make us daffier if this is a bubble? IE, is this proper risk capital that is less fragile and sensitive to death spirals?
Facebook has been aggressively scaling up (in my opinion successfully) their ad business since the IPO. Facebook has/had 2 big make-or-break risks: (1) losing popularity/users (2) failing to turn users/visits into into ad revenue. There was also some risk that in trying to fix #2, #1 would break.
Risk, reward, uncertainty. Nothing unusual here. Risk #1 is constant ambient risk. Risk #2 is/was more of a "what's under that rock" risk. The rock is being turned as we speak and so far the news has been good. FB value has roughly doubled in the last 9 months and IMO, that's the product of "information" about the viability of facebook as an advertising platform.
Here is the subtle point.^ They could have turned that rock just as eerily before IPO. They could have worked on the ad platform sooner or they could have delayed the IPO. I think that move was deliberate. Facebook chose to make that unavoidable, but timeable risky step after the IPO.
As an analogy, imagine a widget company. They get investment design & manufacture a warehouse full of widgets. Then they pause, take some more investment, don't spend it and go public before finding out if their widgets sell.
What role does this pre-IPO money play? FB didn't seem to need it to operate.
^I'm not sure about this. It's a speculation and I don't know or understand enough to be confident at all about it.