From the Fortune article:
> Today, the company announces a new $40 million Series D round of funding. Andreessen Horowitz led the round and existing investors Union Square Ventures, Spark Capital, Bezos Expeditions, and Index Ventures participated. Stack Overflow, founded in 2008, has raised a total of $70 million in venture funding. The company did not disclose its valuation or revenue, but said it is not profitable.
> Currently, Stack Exchange earns a third of its revenue from an advertising product that allows companies like Microsoft market its products to developers. With this new funding, Stack Exchange will invest more heavily in its Careers products, which include job listings and a candidate search database. Clients pay anywhere from $495 for a 30-day job posting to thousands of dollars for annual job postings.
> ...
> The 200-person company will also use the capital to release its site in Japanese, Russian, and Spanish and invest in expanding its Q&A community. Currently, the majority of its users are located in the United States, Canada, the United Kingdom, Germany, and France.
[1] https://www.crunchbase.com/organization/stack-overflow#secti...