Nonsense. This site didn't exist 30 years ago, it doesn't even look liked it existed before January. The methodology, such that it exists, is ridiculous. It's the same stupid crap as "Unskewed Polls". It is totally made up BS.
For the umpteenth time, you can NOT "unskew" a poll. You can reject it, accept it, incorporate it into an average of polls - but you can not "unskew" it, which is exactly what this website is doing.
you’re tilting at a very big windmill trying to explain how polls work. Polls are good if they say what people want them to say and bad if they don’t. There is no critical thinking about how polls (or statistics) actually work.