Of course selling courses makes you money fast. And lots of it given the volume of your sales. This money is passive income. The DEAD DOING (your dead homework files).
Being able to sell courses/files at a higher rating incentivizes performance. We have seen it happen personally. Boosted academic performance and greater earnings go together.
The more sincerely this is done, the further everyone goes. However there is also a message of empowerment. Only the Poor Grad Poor Student people propagate.