How much money does duolingo make?

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  1. #duolingo
  2. #where
  3. #users
  4. #million
  5. #every
  6. #platform
  7. #learning
  8. #major
  9. #valued
  10. #courses
  11. #android
  12. #interested
  13. #browser
  14. #language
  15. #windows
  16. #gamify
  17. #accessible