What happens is that Teachers in schools start tutorial classes. Either singly or in groups they set up tutorial homes and they recruit students from their day jobs. Often there is a hidden implication that if you don't join the tutorial (for which, of course you pay extra money) you will fare poorly in class.
At best, the teachers put less effort into their regular job and students suffer.
I would hate for this system to be adopted widely. Putting stuff online is a little different, but I am very ambivalent about this kind of privatization of education...