Agreed, but the courses do offer a good look at the work, and can give a good introduction to the field. Not sure how it is in the US, but here in Germany proba

Agreed, but the courses do offer a good look at the work, and can give a good introduction to the field. Not sure how it is in the US, but here in Germany probably around 3/4 of people studying CS drop out in the first two years. If people unsure about their path can get a taste for 20 bucks, then that's a pretty great deal!