Approximate revenue-per-employee. Data from Wolfram Alpha and Wikipedia.
Apple makes $2,000,000 per employee. Facebook makes $1,500,000. Google makes $1,000,000. Microsoft makes $800,000. Sony makes $500,000. Kraft makes $400,000. Walmart makes $200,000. McDonalds makes $60,000.
Now, if only there was a good source of users-per-engineer. I read that Facebook is somewhere around 1,260,000. That's just awesome.
We create so much value, and for so many people.
McDonalds may make 'only' $60,000 per employee, but it employs over 1.5 million people. I'm grateful that McDs are providing jobs for those who need them. They also of course offer opportunities for people to own franchises and run their 'own' businesses
 (counting the co-founders as engineers) http://www.crunchbase.com/company/instagram
That's the hacker spirit.
Oh, seems that Facebook makes 1.2 dollars per user from your numbers
As for Facebook's revenue-per-user based on revenue-per-employee and number of users, you'll need the number of employees (not just engineers). That's about 2000, which works out to $4 per user. This is exactly inline with what was documented in this nifty chart: http://wallstcheatsheet.com/wp-content/uploads/2011/01/chart...
Amazon is kicking ass. Apple only makes $150 revenue per iOS user (Asymco).
I think saving money on designers can be justified, after all ;-)
Most of their employees are not engineers, but work in retail. Which makes it a bit of an odd case among the other tech companies :)