But beyond that, WTF were they thinking? On YouTube, your viewers are younger kids who are also creating their own videos. If they're really a fan of your content, they're going to copy you - shamelessly. Did they really think their viewers were just going to sign over royalties from their videos to the Fine Bros and not be pissed off about it? Is it really a good idea as an entertainer to go after your most dedicated fans?
All I've seen them trying is to allow people to legitimately do a copy of their show. I wouldn't never try to copy that format, I wouldn't be afraid to make my own "react to" but I would try to be different, original, with the concept. Having access to their format, their contents, etc... that could be a good way to try, to start, a way that I wouldn't dare taking because of copyright, but would be interesting for simply 20% of literally not much revenue.
Stopping React World does nothing else than stopping legitimate copy...
Nothing is stopping you from making a total rip off of their show and its format today - and you don't need to get permission or pay royalties. That's how it should be; it's not like anyone is using copyrighted characters.
But what Fine was doing was claiming that people were copying them and then trying to lock up the format behind their trademarks.
It's like if you invented the wheel and people started also making wheels, and then I came along and started claiming everyone stole it from me several decades later.