from MIT opencourseware FAQ:
# Commercialization is prohibited. Users may not directly sell or profit from OCW materials or from works derived from OCW materials.
# Commercialization is prohibited. Users may not directly sell or profit from OCW materials or from works derived from OCW materials.
If their goal is simply to stay as they are, just with more content, that is, quite literally, incredible. If I'm wrong though, hats off a million times to them.