Earlier quoted context omitted.
Easy: a downloader that makes it look like you've watched those stupid commercials, but you actually haven't and you're back to the original video. Let the sponsors beware.
Until they see they get very little ROI and stop advertising that way. It's not like people sponsoring aren't looking to see what these channels do for them and just spend blindly...
I don't know what the return on investment was, I always figured they did it as a way to show that they supported the arts.