Udemy sells courses for about $10 year round and people who obtain the course for free also count as students. Udemy takes 50% as well. You could speculate tha

Udemy sells courses for about $10 year round and people who obtain the course for free also count as students. Udemy takes 50% as well. You could speculate that 10,000 copies were sold for $10 for $100,000 and then taken down to $50,000 after Udemy's cut. I'm sure a bunch were likely given away for free to build early momentum on the course which is a common strategy to inflate your student count and get reviews. I wouldn't be surprised if they raked in at least 20k.