It seems to me that digital piracy has different qualities. Making a copy without permission is stealing. Distributing copies without permission, but for free i

It seems to me that digital piracy has different qualities. Making a copy without permission is stealing. Distributing copies without permission, but for free isn't as bad as actually reselling them without permission, or is it? The same laws apply here as to thievery and acceptance of stolen goods. Those laws exist since millennia. It's not only illegal to sell stolen goods, it's also illegal to buy them, with no regard of circumstances. I learned from my parents to watch out for shady characters at market places. But the problem at Udemy seems that even they can't check whether resellers and their posts are genuine. Is that an unintentional aid for acceptance of stolen goods, due to lack of controls, or... intentional aid of acceptance of stolen goods to aid the business idea of Udemy, being an "open platform for education"?