@fullfathomfive

> You have no way of knowing the accuracy of the answers, you can't edit it, you can't search, you can't look at the sources. You just have to trust it.

So the same as every other language learning app?

I'd understand it to be like Wikipedia if Wikipedia was for profit.

https://www.forbes.com/sites/parmyolson/2014/01/22/crowdsourcing-capitalists-how-duolingos-founders-offered-free-education-to-millions/?sh=7a28bf1da725

Still, the founders thought "significantly" about making Duolingo a nonprofit like Khan Academy in the early days, before Von Ahn realized that wouldn't be sustainable.