How much big internet companies make

Here is a list of internet companies and their revenue and market value.

Company	Revenue ($bn)	Market Value ($bn)
Amazon	74.5	150
Google	15.7	378.5
Yahoo	4.7	36.9
eBay	6.6	62.8
YouTube	5.6	21.3
Facebook	7.9	161.4
LinkedIn	1.5	19.1
Twitter	0.2	20.1

These values show how much in turnover the company makes and the market value of the company, it would be useful to know the profit value to make a more realistic comparison with the companies. I was surprised how little revenue Twitter makes, I am not sure how popular it is in Asia and Europe.