Earlier quoted context omitted.
Read up on AOL's position during the .com boom.
can you just explain it?
They say that the only limit to AOL's revenue from this was the amount of space on their website first page, not the number of interested startups.
Basically the valuation of the giants stayed up for as long as easy funding was available to .com's. Their spending habits, without being backed by actual revenues, were more than enough to sustain the stock prices of the few big ones selling to startups whatever they needed (ad space, big iron or aerons).
They all fell together when the crash came and easy funding dried up.