irving_Koelpin70 answered on March 25th 20 at 12:42
There are many popular platforms with free courses: Coursera, edX, Udacity, Khan Academy and many others.
In most cases, supported the ideology that education should be free. These platforms are called MOOC - Massive Open Online Courses. Monetization occurs in a variety of ways - advertising, pay certificates, the support of mentors, sponsors, and more.