I'm curious about this potential open source revenue venue. I believe some companies offer a "learning budget" for their employees.I also believe many developers working for BigCorp would be very happy if they could ask the company to donate e.g. $100 randomly to an Open Source project they use and like.So, why don't open source authors create more small courses like these? It could be a very small one, with bold letters like "this is an educative course ask your company to buy it for you", but still I believe it aligns incentives of everyone fairly well. The developer does learn a bit, the company is paying for education and the author gets money.Main concern would be that it takes time from the developers to build, but it could be a fairly small one? Like a "Improve your knowledge of X library with practical examples" sort of things.So, why is this not more popular? Is it too small of a niche? (not enough companies pay for education) Or is it too much work for little benefit for the authors? Or is it just because selling a course is a lot of overhead for authors? (now should be a lot easier with companies like Gumroad etc).So, the demand question, do you have a budget in your company that you can spend for education? And would you buy a course from the author of one of the libraries that you like/use as a form of donation?