And they probably paid for those college credits. A typical state school might put that at $900 bucks. Great deal huh?
The unpaid internship thing is often a scam to get people to do just the kind of work you're describing. In companies I've worked for, I've seen it done.
I saw interns manually 'cleaning' data in a way that could be entirely automated. I told my employer at the time that they'd never be able to keep up with new incoming data and it's terrible, pointless work. I also said I could automate it in about 20 hours of work. He said, "we'll put an ad in for more interns."
Young people are naive, it's part of being young. It's unscrupulous to take advantage of that. Cuban could have paid internships paying at minimum wage if he'd like. It would still be far less expensive than getting actual professionals to do that work. His real complaint should be that he can't extract any real value for that work from the marketplace, because that's where his real problem is.