Trying to disseminate information (USB sticks, TV shows, money, and anti-government documents) to North Koreans via balloons is not a new trick. In fact South Koreans have been trying to help out their Northern neighbors for years.
The latest balloon attempt has been started by a North Korean defector, Lee Min-bok, who wants to send copies of The Interview movie. So far he has sent over 80,000 copies of the movie. I wonder if he paid for them. Hmmmm. , Not sure how watching The Interview movie will help.