To be fair, it must be pretty complicated to actually keep it running. Then you've got all the security, spam detection, designers, UX people, search engine, mu

To be fair, it must be pretty complicated to actually keep it running. Then you've got all the security, spam detection, designers, UX people, search engine, multi-lingual features. And then you've got the overhead of any medium-sized business - marketing, PR, sales, accounting, admin, HR (have I missed anything?). I guess it does add up. But (so as not to contradict myself) just having all those people doesn't count as an achievement. It's just a cost of doing business that you want to keep as low as possible.