I would like to know simply, if anyone is making money on Stack Overflow, how are they doing it?
I'm not asking if people should be making money on the site or whether or not it's okay—that has been covered already —I'm asking about ways that have made people money.
The most obvious is building a reputation and being offered a job thanks to that reputation. This is common in the open-source world (and in other areas as well), especially if you work on a project of particular commercial interest.
Again, I do not want to debate whether or not it's okay or right or just or whatever to make money on any of these sites. I fully agree making this site "commercial" with paid questions, answerer ads, etc. would turn it into a dump. I also understand the vast majority of people contribute as a service to the community. I think that's wonderful and I appreciate that sort of commitment very much.
An answer of "they don't" is fully acceptable. I'd also be curious if there are any other answers.