I have also done many MOOCs and I largely agree with you. Concretely, I found Udacity was simply too expensive so I preferred Coursera as it had great quality

I have also done many MOOCs and I largely agree with you. Concretely, I found Udacity was simply too expensive so I preferred Coursera as it had great quality at a good price. Udemy is full of low-quality trash so I don't bother with it. EdX has some excellent courses that aren't available elsewhere (for example, Plasma Physics) and also has much more reasonable pricing. I mean, I live in Europe and for the price of an Udacity course I could attend a full brick and mortar course that is much more appreciated by employers.