Well, one of them is this actual forum apparently. It was the 3rd highest earning site for Adsense in 2016. Here is a full list of the top 10 for 2016: http://www.guitricks.com/2015/10/top-10-highest-adsense-earners-in-world-2016.html
None of those sites are worth looking at, it's all guesswork and bullshit, how would they know how much a site earns unless the site owner tells them?
these fake stat sites are always wrong. they are no different from fake news sites... and there is a good reason for this, people click on them, and their sites have ads waiting for someone like you to come along... It is like giving me a profile, telling the world what I am worth, when in fact you have no access to my financial records...