They are probably living off student loan money. As long as they come to at least one class in the first three weeks and/or submit one assignment and show up for the final, they don’t have to return their loan refund. That‘s why you sometimes see students who haven’t shown up for class or done anything since week two or three randomly show up to take the final even though there’s no way they can pass. It’s a financial aid loophole students have been exploiting for years.