1. Never seen any of that in existence so if you're going to build it, you're probably the first one to do it.
2. I have never followed one and it's also the same question that have built in my mind for which signals you're going to analyze with your website. The legitimacy of your website will be questioned if you're just picking random signals although as a matter of fact that determining one that's real and legit is difficult to verify.
2. What do you mean random? Just take all the signals of a certain channel and make an analysis of the results..
My bad, I've thought that you'll be extracting most of the signals that you'll know which means that it will be including those random channels that gives signals too.
But if that's only one channel and you're going to take all of its signal then you have a reference that you're only relying to very one source.