I don't love (web sites) easily
Simply, "What-The-Internet-Thinks" is a search engine based on "sentiment", being able to recognize subtleties such as sarcasm. I've hunted around and no one knows how this thing truly works, just that it's popular.
WhatDoesTheInternetThink.net is like one of those flash Gallup polls that tap into public opinion. The web tool searches the internet for the global opinion on what the world thinks. It takes your search term and returns results as Positive, Negative or Indifferent. The tool searches the web using Google, Yahoo, Bing, and Twitter - or all combined.
What criteria the engine bases its results on is, as mentioned, unclear, so take the results with a pinch of salt.
I can see results being used to attempt marketing trends/evaluations, perceived 'good' & 'bad'. So I'm not sure what else to tell you other than have fun with it, and if you're doing some research be sure to footnote this review.
Ron