I can't think of a single business-oriented use where this would be appropriate, so perhaps some sort of use in kids education or targeted at a teenage audience?
The language on the site definitely suggests this is aimed at education. The HN title however, is more ambiguous and suggests it could be used in a professional context.
You get it right! We aim at online teachers and online instructors, however some of our initial users have been using it business-oriented and suggested that there are quite some creative ways to use the app.