And they ended the day a $25B company...
My guess,
In under fifteen years, they will be the subsidiary of some other big company. That company will pay under $400million for it, and even at that price they will be overpaying. It will end its days as some mostly abandoned website that nobody really knows what it does by that point, even the people running it.
They may grow fast, but they die even faster.
Just look at companies like AOL or Netscape.