There are a few key cases, here. a) Public Education (much of the planet) b) Parent-Funded Higher Education (US-centric model) c) Corporate Training (emphasis for most learning platforms, these days) d) For-Profit Universities (Apollo Group and such) e) xMOOCs (learning as a startup idea, with freemium models) f) Ad-Supported Apps & Games (Hey! Some of them are “educational”!)