From what I've read, it's determined by the quality of the ads that show up on your pages, based on the articles that you write. BUT ... I would love to understand that in greater detail. I hope someone else has more insight!
I would love to understand this better myself. The cpm seems to change radically very often even for the same basic set of hubs I've written.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.