Don't be naive, MFauli. I'm pretty sure not a single subber group wants somebody else to cash with their work (and not only because of the unwanted attention it could cause). However, what the subbers are doing is not legal, either. It's just not likely to gather so much attention, because no business is involved. But in the real world the subber groups' options are limited. All they can do is to complain or cease their work. They can't very well take any official action, because they don't own the rights to the video/audio. Technically they do own rights to the subtitles and subtitling layout, but it would be hard to explain that to the police.