Well, that alone is not worth 250M
and that neither... I have 2 Mio. files / articles and a lot of them are unique or uniquely enhanced with reviews, etc. and I also have 4M uniques monthly... yet the site has not the last inch it takes to be evaluated so highly. Some feedback I had in the last weeks was that the status quo might be 500k, it is the story that counts and how good you are in selling the future.
VC lives on dreams, well aware that 95% goes downhill... but if you make 5% of your investments fly, all is good.
I congrat the guys at howstuffworks for that deal. I would evaluate the site somewhere between 20-40M but they obviously sold the story of their future for the tenfold - and, who knows, with that war chest and whatever the story is, it might become true!