"There are thousands of volunteers who donated their labour to Duo... Bit by bit all of our work was hidden from us as Duolingo became a publicly-traded company."
From 2015 to 2022, I spent hundreds of hours on Duolingo, translating articles, answering language questions on the forums, and helping to improve the smaller courses by reporting mistakes.
There are thousands of volunteers who donated their labour to Duo: the course creators who wrote their course...
Never ever ever ever ever give your work for free to a startup unless it's running under an open source model that guarantees even if they do go public, all that work remains openly available to everyone!
You keep bringing up open source, why? All I did was say that being a non profit isn't as good an indicator as you might think. How does open source factor in it?