Content is always available. People pay for courses for it to be organized and given accompanying lectures and assignments. I took 2 courses on Coursera a few

Content is always available. People pay for courses for it to be organized and given accompanying lectures and assignments. I took 2 courses on Coursera a few years ago. They were anything but worthless certificates. Actually neither even offered certificates. They were hard... Probably about as hard as the real course... Probably because they are real courses. I easily spent 100+ hours on each.