> keeps Duolingo's educational quality high as they chase faster scaling

Duolingo is widely regarded as more of a game than a high-quality learning experience. People obvious learn something from it, but it's a running joke almost everywhere on social media that people can be 100s of days into their Duolingo streak and still not learn much.

Getting people off of Duolingo and onto less gamified, more rigorous language learning courses is a common theme in the language learning world.