alt Hacker NewsI fondly remember visiting Wikipedia HQ in Jan 2012. It was amazing to see how small their "operation" was :)
Back then they had 474M monthly unique visitors, 83,444 active contributors and a staff of less than 100. I'm still blown away by the collaboration. To me, that was the promise of "Web 2.0".
On the kitchen door they hung xkcd 903, 906 and another webcomic mentioning that only 13% of updates to Wikipedia are from women (can't find the source). The wifi password back then was "knowledgeshouldbefree" (maybe it still is?)
Because they don't pay 99.9% of the people who effectively work for them.