Maybe redundant, but how do you actually join? On their web site I do not see any partner etc. page, so how do they actually share that profit? I have so many q

Maybe redundant, but how do you actually join? On their web site I do not see any partner etc. page, so how do they actually share that profit? I have so many questions: - how do they share profit? by number of visits? then how to avoid fake sites and those that copycat other ppl content? ...