From a Washington Post article a while back:
Justin Anthony Knapp doesn’t necessarily mind that: With nearly 1.5 million contributions, the 33-year-old Wikipedian is more active on the site than literally anyone else — including members of the nonprofit Wikimedia Foundation’s paid staff.
Every day, Knapp drives his 15-year-old car from Indianapolis’ poorest neighborhood, where he lives, over to a restaurant on the city’s West Side; he delivers pizzas to pay his bills, in between piecemeal work at a grocery store and a crisis hotline.
Every night, Knapp logs onto Wikipedia ...
https://www.washingtonpost.com/news/the-intersect/wp/2015/07...
And the Wikimedia Foundation is undertaking great efforts to get people in developing countries to edit for free, in part so that Google, Amazon and Apple have Wikipedia articles for Siri, Alexa and Google Assistant to read out and make money in those countries ... same with Google's and Bing's knowledge panels, which are largely based on Wikipedia.