Let me stress that I am not talking about web sites in general but rather am talking specifically about sites that depend on quality unpaid contributions from a large numbers of people.
>building a big successful company at scale is rarely done without taking on external investment.
Wikipedia is a counterexample. According to Alexa, Wikipedia is the sixth most visited web site in the world. But more to the point, no VC-funded or stock-market-funded company I know of is foolish enough to try to compete with Wikipedia. I think that fifteen years from now, we will see a similar situation among Q-and-A sites -- at least those where the answers are contributed by unpaid users. In other words, I predict that Quora -- as well as Stack Exchange, which has also taken VC funding -- will be eclipsed within 15 years by sites not funded by VC or other profit-motivated investment.
Any competition for Google Search is likely to come from companies like Apple or Microsoft that already have plenty of money to pay engineers or from investor-funded for-profit companies. That is because the "non-profit sector" is unlikely to be able to summon up enough skilled labor or funding to compete with Google Search.
In contrast, setting up a competitor to Quora or Stack Exchange is relatively easy (especially since these new entrants can learn from Experts Exchange, Stack Exchange and Quora), and going the non-profit route (or the for-profit "lifestyle business" route without external funding) does not alienate a large fraction of potential unpaid contributors.
This is somewhat a non-sequitur, but I just want to highlight one significant distinction between SE and Quora, which is that "[All user-generated] content (questions and answers) posted on the Stack Exchange Network is licensed under a Creative Commons license, Attribution Share Alike." So in fifteen years when SE is no longer in fashion, those answers can live on in some form.
Atwood had an idea that SE would be "like Wikipedia" for QA, and Stack Overflow has certainly had success in that regard. I think that contributors to the site get very much the same value proposition as that of Wikipedia, if not slightly more in the user profile/karma regard.
Of course, none of this negates your point about the influence of funding!
>building a big successful company at scale is rarely done without taking on external investment.
Wikipedia is a counterexample. According to Alexa, Wikipedia is the sixth most visited web site in the world. But more to the point, no VC-funded or stock-market-funded company I know of is foolish enough to try to compete with Wikipedia. I think that fifteen years from now, we will see a similar situation among Q-and-A sites -- at least those where the answers are contributed by unpaid users. In other words, I predict that Quora -- as well as Stack Exchange, which has also taken VC funding -- will be eclipsed within 15 years by sites not funded by VC or other profit-motivated investment.
Any competition for Google Search is likely to come from companies like Apple or Microsoft that already have plenty of money to pay engineers or from investor-funded for-profit companies. That is because the "non-profit sector" is unlikely to be able to summon up enough skilled labor or funding to compete with Google Search.
In contrast, setting up a competitor to Quora or Stack Exchange is relatively easy (especially since these new entrants can learn from Experts Exchange, Stack Exchange and Quora), and going the non-profit route (or the for-profit "lifestyle business" route without external funding) does not alienate a large fraction of potential unpaid contributors.